I’ve become good friends with several of the students in my school _______ I met in the English speech competition last year.

Why hasn’t Mr. Li come to work yet?—Because he _______Guangzhou for a holiday.

What should we do first if we want to ______our village?

. — Did Kate do best in the final exam?. — No, but of all the students she did __________.

The man called his professor for help because he couldn’t solve the problem by _________.