Choose the best option to complete each sentence.
1Although employees can choose whether to work from home, everyone ............... attend the in-person safety training on Friday; the company has made it compulsory.
Wrong!
"must" expresses the compulsory attendance stated by the company.
2You ............... bring your own towel because the hotel provides one, although you may use your own if you prefer.
Wrong!
"don't have to" shows that bringing a towel is optional because the hotel provides one.
3The bridge is closed to cyclists until repairs are complete, so you ............... ride across it.
Wrong!
"mustn't" expresses the prohibition created by the bridge closure.
4Renewal is not required before this trip, but your passport expires next month, so you ............... renew it soon.
Wrong!
"should" gives sensible advice because renewal is not required for this trip.
5The last train leaves in ten minutes, and the next one is tomorrow morning, so we ............... leave now if we want to get home tonight.
Wrong!
"must" expresses necessity because leaving later means missing the last train home.
6After the deadline moved to Friday, my supervisor said I ............... finish the report on Wednesday, although I could if I wanted.
Wrong!
"didn't have to" expresses the absence of a past obligation; finishing early remained possible.
7When the fire alarm sounded during yesterday's meeting, the safety officer ordered everyone out, so we ............... leave immediately.
Wrong!
"had to" expresses the past obligation created by the safety officer's order.
8Under laboratory rules, staff ............... wear protective glasses whenever chemicals are being used.
Wrong!
"have to" expresses a requirement imposed by the laboratory rules.
9You ............... answer now; the offer remains open until Friday, and you are free to decide earlier.
Wrong!
"don't have to" means there is no obligation to answer before Friday.
10Because the training is now online, employees ............... travel to head office next month, but they may go there if they prefer.
Wrong!
"won't have to" expresses the absence of a future obligation, while travel remains permitted.
11If you feel nervous about your presentation, you ............... practise it in front of a friend; it is optional but usually helps.
Wrong!
"should" gives useful advice rather than stating a requirement because the practice is optional.
12To enter the exam room, candidates ............... show photo ID; anyone without it will be refused entry.
Wrong!
"must" expresses the entry requirement confirmed by the consequence for candidates without ID.
Exercise complete
0 out of 12
correct answers
Answers
- Although employees can choose whether to work from home, everyone must attend the in-person safety training on Friday; the company has made it compulsory.
- You don’t have to bring your own towel because the hotel provides one, although you may use your own if you prefer.
- The bridge is closed to cyclists until repairs are complete, so you mustn’t ride across it.
- Renewal is not required before this trip, but your passport expires next month, so you should renew it soon.
- The last train leaves in ten minutes, and the next one is tomorrow morning, so we must leave now if we want to get home tonight.
- After the deadline moved to Friday, my supervisor said I didn’t have to finish the report on Wednesday, although I could if I wanted.
- When the fire alarm sounded during yesterday’s meeting, the safety officer ordered everyone out, so we had to leave immediately.
- Under laboratory rules, staff have to wear protective glasses whenever chemicals are being used.
- You don’t have to answer now; the offer remains open until Friday, and you are free to decide earlier.
- Because the training is now online, employees won’t have to travel to head office next month, but they may go there if they prefer.
- If you feel nervous about your presentation, you should practise it in front of a friend; it is optional but usually helps.
- To enter the exam room, candidates must show photo ID; anyone without it will be refused entry.

