—Where is Jack?
—I noticed that he ________the teacher’s office just now.
A. went into B. goes into C. was going into D. is going to
—Don’t worry. Your uncle is coming to help you.
—________he doesn’t come?
A. What if B. Why not C. What about D. What for
My friend’s flight had taken off _________ I got to the airport to see him off.
A. while B. after C. before D. until
The monkey was seen _________off the tall tree.
A. jump B. jumps C. jumped D. to jump
—What do you think about the idea?
—I am really against _________ a running race in the street.
A. to have B. having C. to having D. have
—Do you know whose dictionary it is?
—It ________ be Ann’s. Look! Her name is on the first page.
A. must B. could C. might D. can
