Let's go climbing，shall we？
You _____ be joking!Don't you know I'm afraid of high places？（ ）
A．mayB．canC．mustD．should
—Suzy，your room is really in a mess.
—Sorry，Mum.I'll _____ right now.
A．tidy upB．put upC．look upD．stay up
The policeman told the children ______ in the river.It's too dangerous!
A．to not swimB．not to swim
C．not swimD．not swimming
—______ do you go to the school library？
—Twice a week.
A．How longB．How oftenC．How soonD．How much
Mary shut the window just now ______ she could keep the insects out.
A．so thatB．whenC．tillD．after
This year's Beijing Music Awards will be covered ______ on Sunshine TV this Saturday.
A．livelyB．aliveC．livingD．live