—Simon，I wonder _______. —Last Saturday.
A. when the foreign visitors arrived B. when did the foreign visitors arrive
C. when the foreign visitors will arrive D. when will the foreign visitors arrive
The factory ______ its waste into the river, but now it deals with the waste in a new way.
A. used to dump B. is used to dump C. used to dumping D. is used to dumping
一Shall we go out for a trip to relax ourselves after the final exam?
A. That’s all right. B. It doesn’t matter.
C. That’s a good idea. D. Have a great time.
—We need a new leader for our Helping Hands Club，but I don’t know_______.
—Why not Mary? She is always willing to help others.
A. what to choose B. how to choose C. when to choose D. who to choose
To improve his English，he spends _______one hour a day listening to English programmes.
A. at last B. at least C. at once D. at all
The art exhibition is really worth _______，and you’re sure to learn lot from it.
A. visit B. to visit C. visited D. visiting
