用所给词的适当形式填空。

1. They________ (come) to China two months ago.

2. Where________ (be) she last week?

3. The twins________  (be)  at school this morning.

4. ________ he________  ( tell)  you a story last Sunday?

5. We                ________  (not watch) TV last night.

成人泌尿系梗阻常见原因（）

A.结石，损伤，肿瘤或结核

B.盆腔内疾病

C.先天性畸形

D.前列腺增生症

E.包皮过长