--Do you know what caused the accident?       --- No, not yet. The matter _____.
#101883
A
is being looked into
B
was being looked into
C
looked into
D
is looked into
推荐题目
We had hoped to catch the 10:20 train, but _____ it was gone.
#103722
A
found
B
had found
C
would find
D
would have found
  The teacher tells his students to read the novel over and over again until they ______ it.
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A
understand  
B
understood
C
have understood
D
have been understood
We _____ to move but are still considering where to go to. 
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A
are deciding
B
decided
C
have decided
D
had decided