We should do what we can ______ people’s hard work pays off.
A. be sure B. being sure
C. making sure D. to make sure
Lucy has a great sense of humor and always keeps her colleagues with her stories.
A. amused B. amusing
C. to amuse D. to be amused
In some parts of London, missing a bus means _______ for another hour.
A. waiting B. being waited
C. to wait D. to be waiting
According to the driver’s explanation, it was not his carelessness but the bad road conditions that _________ for the accident.
A. was to blame B. was to be blamed
C. were to be blamed D. were to blame
The professor tried his best to make the students__________what he was saying but he found it hard to make himself ___________.
A. understand; understand
B. understand; understood
C. understood; understood
D. understood; understand
_____ the yard, I found it _____ with lots of _____ leaves.
A. Entering; covering; fallen
B. Having entered; covered; falling
C. Entering; covering; falling
D. Entering; covered; fallen
