问题
填空题
用所给单词的适当形式填空。
1. It would be great __ _ (have) a happy family.
2. It’s hard ____ (work)out the problem.
3. I think Lisa __ (know) that.
4. That is the ___ (big) building in the city.
5. We need to help the __ _ (poor).
答案
1. to have 2. to work 3. knows 4. biggest 5. poor
