The vegetables in his field ________ well, because they are pollution­free.
#99491
A
are selling
B
have been sold
C
are sold
D
sell
推荐题目
 — The floor is dirty.— Yes. It _______ for two days.
#99920
A
hasn’t swept
B
didn’t sweep
C
hasn’t cleaned
D
hasn’t been cleaned
--We haven't heard form Jane for a long time.  ---what do you suppose ___ to her?
#103978
A
was happening
B
to happen
C
has happened
D
having happened
Don’t ______ life’s small joys while searching for the big ones. 
#100855
A
contradict
B
overlook
C
obtain
D
confirm