I need one more stamp before my collection ______.
#104144
A
had completed  
B
completes
C
has been completed
D
is completed
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Helen ________ her keys in the office so she had to wait until her husband ______ home. 
#101502
A
has left; comes
B
left; had come
C
had left; came
D
had left; would come
—I’ve got to go now.—Must you ?I ______you could stay for dinner with us.
#104935
A
think
B
thought
C
have thought
D
am thinking
—I’m sure Andrew will win the first prize in the final. —I think so. He _________ for it for months.
#104593
A
is preparing
B
was preparing
C
had been preparing
D
has been preparing