—You were not listening;what troubled you?—I         my coming math exam.
#102663
A
am thinking about
B
was thinking about
C
had thought about
D
will think about
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— Hi, Torry, can I use your  computer for a while this afternoon? —Sorry.           .
#101813
A
It’s repaired
B
It has been repaired
C
It’s being repaired
D
It had been repaired
With more forests being destroyed, huge quantities of good earth      each year.
#102348
A
is washing away
B
is being washed away
C
are washing away
D
are being washed away
Helen ______ her keys in the office so she had to wait until her husband ______ home. 
#102080
A
has left; comes
B
left; had come
C
had left; came
D
had left; would come