“Underground” is the only word in the English language _____ begins and ends with the letters “und”.

He slipped and broke his leg. _________, he will have to be away from school for two or three months.

To ______ surprise, I got an A in my English test.

Be quite, the head teacher Mr. Qian is coming. —Don’t worry. It _____ be him. Mr Qian is much fatter.

What do you think of the four classics (名著)of China?－I hear that they are wonderful, but I’ve read _______ of them.