1 They (can/might) be away for the weekend but I'm not sure. 2 You (may/might) leave now if you wish.
3 (Could/May) you open the window a bit, please?
4 He (can/could) be French, judging by his accent.
5 (May/Can) you play the piano?
6 Listen, please. You (may not/might not) speak during this exam.
7 They (can't/may not) still be out!
8 You (couldn't/might not) smoke on the bus.
9 With luck, tomorrow (can/could) be a sunny day.
10 You (can/might) be right but I'm going back to check anyway.