He pretended __________when his mother stepped into the room..
#93883
A
to study
B
studying
C
to be studying
D
to have studied
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He used to ______ cards, but now he is used to _______ a walk after supper.
#96585
A
play; taking
B
playing; take
C
play; take
D
playing; taking
I am considering ________ him tomorrow because he is considered ________ great contributions to science cause.
#88312
A
to visit;to make 
B
visiting; making
C
to visit; having made 
D
visiting; to have made
The bad weather meant__________ the rocket launch(发射)for 48 hours,.
#98047
A
delaying
B
having delayed
C
to delay
D
to have delayed