SoS! Need help! The task is "Underline the correct word/phrase in each sentence!
1. I don't think you could/should tell anyone yet.
2. That mustn't/can't be the hotel Jane told us about
3. That can't have been/shouldn't have been Nick that you saw

Question

SoS! Need help! The task is "Underline the correct word/phrase in each sentence!
1. I don't think you could/should tell anyone yet.
2. That mustn't/can't be the hotel Jane told us about
3. That can't have been/shouldn't have been Nick that you saw

Answer

Hmmm, it seems that all the alternatives are potentially valid.  However, taking the most obvious ones:

1. should
2. can't
3. can't have been

Answer

1. should
2. can't
3. shouldn't have been