1 . There is no doubt ______ the suggestion he puts forward at the meeting is practical. (用适当的词填空)

2 . I found ______ useless trying to talk him out of buying the expensive toy. (用适当的词填空)

3 . It will take some years __________ most new homes begin to use this new technology. (用适当的词填空)

4 . It is _______a good film that I like to see it a second time. (用适当的词填空)

5 . Not only can you post specific questions, ______ you can also broaden your knowledge by reading posts from other English learners around the world. (用适当的词填空)

6 . It’s ________ (recommend) that we should try to read more books in our spare time. (所给词的适当形式填空)

7 . I was about to leave my house ________there was a knock at the door．（用适当的词填空）

8 . They are_________clever children that they can do it by themselves. (用适当的词填空)

9 . I was having breakfast with my three children _________ water started filling my home. (用适当的词填空)

10 . I was about to leave ________ a hungry bear approached me and charged at me. (用适当的词填空)