用括号里所给词的正确形式填空。

1. The problem is too difficult. It took me half an hour ____________ ( work ) it out.

2. Most people like easy jobs and don't like to do the __________ (pleasant)work.

3.There are some patients _________( wait ) for the doctor.   

4. When I walked past,I saw him __________ (play) computer games.  

5. Hurry up, the train _______________(leave) in two hours。

T梁架设后，相邻梁跨梁端桥面之间、梁端桥面与相邻桥台胸墙顶面之间的相对高差（）

A、不得大于5mm

B、不得大于10m

C、不得大于12mm