Mr. Liu is our new head teacher this term and he wants to know _______.
--This pair of shoes looks very pretty. --Really! Why not ________?
--Attention please, everybody! Please ________. Mr. Green will begin his report at once.
.-- Is this i-phone _________? --No, it isn’t. I am just thinking of buying________.
The heavy rain stopped the tourists________climbing down the hill.
This is such________useful book that I have learned a lot from it.