用所给动词的适当形式填空。
1. The sheep ________ all ________ (lie) under the tree when I saw them.
2. The trees ________ (cut)down by the farmers Now.
3. They ________ (learn) more than two thousand words by the end of last term.
4. Hurry up, or you ________(be) late for school.
5. ________ the boy ________ (see) this kind of bird before ?
6. Why was he made ________ (cry)?
7. Who told you ________(not finish) the homework ?
8. What ________ (should do) on time ?
9. ________ (eat) too much is bad for your health.
10. Neither of you ________ (climb) the Great Wall since then.