1.I suggests( telephone)...the hospital before( ask)...the police( look)...for him.

2.I tried(explain)...to him but he refused(listen)...and went on (grumble)...

3.Would you show me how(operate)...this machine please?

4.She ought to work shop.She(have)...a headache because she(work)...too long.

5.I always try(come)...in quietly but they alwasys hear me(go)...upstairs.It's impossible(climb)...an wooden staircase at night without(make)...a noise.

6.We (walk)...for about 20 minutes when a car (stop)...and the driver(offer)...us a lift.

7.I have(stay)...here.I'm on duty.But you needn't (wait)...;you are free(go)...wherever you like.

8.It's no good(write)...to him.He never(answer)...your letter.

9.The teacher told the chidrens(look up)...the rules themselves,as it(explain)...many times before.

10.A central bank(break into)...and $300000(take away)..last night.The police(look for)...the thieves.