Ⅰ.单句语法填空
1．I was ________ (astonish) to hear that the little boy swam across the river alone.
2．With all the tasks ________ (finish)，they went to the cinema happily.
3．I try to convince him ________ the reality of the danger.
4．As a famous ________ (perform)，he is always popular with his fans.
5．What has caused his ________ (fail)?
