1 . When the man came in, gun in hand, we all stood there, ________(astonish).

2 . When I am tired with math exercises, I will go out for a walk to get ________(relax).

3 . Olivia has a good sense of humour and always keeps her friends ______（amuse）when they are in a bad mood. (所给词的适当形式填空)

4 . At the magic performance, I found it______________(astonish) that a pigeon appeared out of the magician's empty hand. (所给词的适当形式填空）

5 . It's ________(annoy) that we can't travel until Thursday, but at least the fare's cheaper then. (所给词的适当形式填空)