It is wise ____ Mark ____ his teacher's advice.
A. for , to follow
B. for , following
C. of , to follow
D. of , following
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It is necessary ____ this in mind.
A. keep
B. keeping
C. kept
D. to keep
____ took us half a year to finish the work.
A. This
B. That
C. It
D. They
____ is true that he won the game.
A. This
B. That
C. It
D. The
It is ____ that 5 people were killed in the earthquake.
A. report
B. reported
C. reporting
D. to report