45岁男性，车祸3小时入院，诊断为骨盆骨折，左股骨干骨折及左胫骨开放性骨折，首先应密切观察哪种并发症（）

A.休克

B.泌尿系感染

C.创口感染

D.疼痛

E.坠积性肺炎

根据句意，用括号中所给动词的适当形式填空。

1. My father ________ (not have ) lunch. He is very hungry.

2. ________ (bring) your reading books here tomorrow and we will do some reading.

3. You can play football after your homework ________ (finish).

4. The students ________ (tell) to learn English well last month.

5. We helped many poor children by ________ (send) them school things in the past.