用所给词的适当形式填空。

1. Mr Green _______ (be) his father.

2. _______(this) are English maps.

3. I don't know _______ (she) name.

4. Those _______ (watch) are in the case.

5. _______ (it) are my rulers.

我们少先队员的标志（）。

A.队旗

B.红领巾

C.队角

D.队徽