You should understand the traffic rule by now. You’ve had it ________ often enough.
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A
explaining
B
to explain
C
explain
D
explained
推荐题目
Internet, as well as telephones, ____ an important part in daily communication.
#102462
A
is playing
B
have played
C
are playing
D
play
—Do you feel like going to the cinema tonight?—Sorry, I ’ m so tired．I ____an early night．
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A
have
B
am having
C
have had
D
had
The zoo keepers is worried because the number of visitors __ smaller and smaller.
#103375
A
become
B
became
C
is becoming
D
have become
My sister-in-law___________ my brother for ten years.
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A
married with
B
has married
C
has been married with
D
has been married to
一When shall we start the restoration of the historic buildings?一Not until our plan________ by the committee.
#101458
A
will be approved
B
approves
C
is to approve
D
has been approved