1 . _____________never occurred to me that he would fail in the exam. (用适当的词填空)

2 . In our daily life, WeChat makes ________ easy for people to communicate with each other. (用适当的词填空)

3 . It is no use ________ (tell) him the witty words , because he never smiles. (所给词的适当形式填空）

4 . There is no denying that volunteers consider ____________ important for them to protect the historical sites in China.

5 . His being late made _________ impossible for the meeting to be held on time.

6 . I think ______ possible to send a letter to someone anywhere in the world without putting a stamp on the envelope.

7 . I would appreciate ____ if you could help me with my English.

8 . It___________(know)to us that he is one of the most famous football players in the world.（所给词的适当形式填空）

9 . My friend is a reliable person, and you can rely on ____that he will give you a hand. (用适当的词填空)

10 . ____ is a fact that English is being accepted as an international language. （按要求补全句子）