No one is allowed ______ in the classroom.
A. smoking B. smoke C. smoked D. to smoke
The rice made _____ possible to produce one-third more of the crop in the same field.
A. that B. this C. one D. it
I regret ______ you that you will miss your flight if you don’t hurry up. You have only twenty minutes to go.
A. to tell B. telling C. having told D. to telling
. ______ hard. You are sure to succeed!
A. Working B. Work C. Worked D. To work
There was a time _____ hunger was a disturbing problem in this area.
A. how B. when C. that D. why
His _____ expression suggests that the news he read just now must be _____.
A. excited; exciting B. excited; excited
C. exciting; exciting D. exciting; excited
