用所给动词的适当形式填空。

1. —Why isn't Jim here?

    —He's busy. He ________(take) care of his aunt's baby at home now.

2.—What's Mr. Clarke going to do tomorrow?

   —He'll go fishing if it_________(not rain).

3. Linda_________ (make) a lot of friends since she came here last autumn.

4.—Did Jack finish_________ (clean) the house this morning?

   —Yes, he did.

5.—Have you heard of the Great Wall, Mr. Read?

   —Yes. It's a place of great interest in China. It ________(build) thousands of years ago.