Ⅰ.用所给动词的适当形式填空
1.If Bill (tell) me yesterday， I should know what to do now.
答案：had told
2.Without electricity human life (be) quite different today.
答案：would be
3.Jane (be) prettier， but she doesn't care much about her clothe s.
答案：could be
4.If you don't lose heart， you (succeed).
答案：will succeed
5.If my brother (be) here， everything would be better.
答案：were
6.He (give) you more help， but he was so busy at that time.
答案：would have given
7.If he (come)， he will bring his viol in.
答案：comes
8.If y ou had taken the medicine yesterday， you (be) well now.
