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
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Jack doesn’t smoke now, but he ______________ for almost twenty years.
#101839
A
was smoking
B
smoked
C
has smoked
D
had smoked
I don't know when he ___. But when he ___ back, I’ll let you know.
#103935
A
comes ; will come
B
will come; comes
C
comes;comes
D
will come; will come