You must shine your shoes.A:polish B:clear C:wash D:mend

A、that

B、how

C、what

D、which

3．—__________ 1 go out for a while?

—No，you __________ You must finish your homework first．

A． Must，needn't

B． Can，may

C． May，mustn't

D． May，must

A.predicted

B.specified

C.yielded

D.classified

If your radiotelephone fails while underway，______．

A.you must visually signal oncoming vessels

B.you must immediately tie up in the nearest port until the radiotelephone is repaired

C.you must anchor until the radiotelephone is repaired

D.the loss of the radiotelephone must be considered in navigating the vessel

Your computer runs Microsoft Windows 2000 with Service Pack 3.You need to upgrade your computer to Microsoft Windows Vista. You must achieve this goal without reinstalling the applications.What should you do?（）

A.A

B.B

C.C

D.D

I must hold ______ for any damage which may result from the accidents you have caused．

A.your responsible

B.you responsible

C.you are responsible

D.your are responsible

I'm not helping you. You must wash your socks

A. you

B. yourself

C. itself

If your vessel is the stand-on vessel in a crossing situation ______.

A.you must keep your course and speed

B.you may change course and speed as the other vessel must keep clear

C.the other vessel must keep her course and speed

D.both vessels must keep their course and speed