1 . This is the greatest challenge _____________ we’ve ever met with. (用适当的词填空)

2 . The nurse_____________ we talked about can speak English fluently. (用适当的词填空)

3 . _____________is often the case, he was late again this morning, _____________made his head teacher annoyed. (用适当的词填空)

4 . Lucy was absent from Mr Smith's lecture yesterday, _____________she made an apology to him. (用适当的词填空)

5 . The ship, _____________ the Europeans sailed to the American continent, was called the Mayflower. (用适当的词填空)

6 . Here are agents from America, some of_____________ are our old friends. (用适当的词填空)

7 . We do not respond to every candidate. If __________ (select), you will be contacted by a manager. (所给词的适当形式填空)

8 . Lack of exercise is also a risk factor for heart disease but it’s relatively small when __________ (compare) with the others. (所给词的适当形式填空)

9 . As you know, once ______ (pour), water cannot be taken back. (所给词的适当形式填空)

10 . You’ll want to look back on your journey ___________ (see) how far you’ve come. (所给词的适当形式填空)