It was in 1969 ______ two Americans went to the moon by spaceship.
A. that B. before C. when D. Since
—What ________ an important part in their lives?
—Friends.
A. plays B. takes C. makes D. Acts
He wouldn’t leave the TV set, ______ he was going to have an important exam the next day.
A. even so B. even if C. as though D. as if
As soon as she saw her boyfriend, she ________ crying.
A. burst into B. broke out C. burst out D．broke in
—May I ask a question after class，Sir?
— , but not during my lunch break.
A. I am sorry B. Anytime C. Go ahead D. Certainly
The scientists have made _______ possible for us to communicate with each other more easily.
A. it B. that C. this D. them
