As middle school students, we must go to school ________ time.
Our team won the game. The coach was pleased w________ each member.
He left school and began to work ________ twelve. He went through many things.
A.at the age of B.at the beginning of
C.at the top of D.at the bottom of
Grace often feels nervous when she gives a speech ________．
A.in public B.in total
C.in common D.in fact
Most of the wild animals are_______ because of their bad living environment.
A.in need B.on duty C.at work D.in danger
My son lives a little far from his office, so he always goes to work ________ bus.
