29. If city noises____from increasing, people___shout to be heard even at the dinner table 20 years from now.
#103910
A
are not kept; will have to
B
are not kept; have to
C
do not kept; will have to
D
do not kept; have to
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Although medical science________control over several dangerous diseases，what worries us is that some of them are recurrent.
#99174
A
achieved
B
has achieved
C
will achieve
D
had achieved
Walmart，which is one of the largest American supermarket chains，________ some of its stores open 24 hours on Mondays through Saturdays.(2012·安徽)
#99568
A
keeps
B
keep
C
have kept
D
had kept
Good heavens! There you are! We _____ anxious about you, and we _____ you back throughout the night.
#104714
A
are; expect
B
were; had expected
C
have been; were expecting
D
are; were expecting
—How long in America?—Two years. I came back last month.
#101175
A
have you studied
B
do you study
C
would you study
D
did you study