I can't______ this type of computer, it's too expensive.
A. cost
B. spend
C. afford
D. trade
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I remembered______the door before I left the house.
A. locking
B. lock
C. to lock
D. locked
The students were assigned different tasks according to their______abilities.
A. respectful
B. respectable
C. respective
D. responsible
We found that the plane_____ when we got to the airport.
A. already took off
B. had already taken off
C. was already taking off
D. was already taken off
When they entered the room, they found the windows open and something______.
A. stolen
B. to be stolen
C. to steal
D. stealing
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