----How long are you staying?

　 ----I don't know.___________.

　 A. That's OK　 　 B. Never mind　 C. It depends　 D. It doesn't matter

Having been late for school once again, he ______（恳求）his teacher to excuse him.

Shortly after we ______, a waiter came over to us with a smile.

A. sat　　　　　 B. seated　　　　　　 C. was seated　　　　 D. seated ourselves

—When__________ and visit our exhibition next month?

　 — When_______, I will let you know.

A. will he come; he will come B. will he come; he comes

C. does he come; he will come D. does he come; he comes

—Have you finished the book?（ ）

―No, I’ve read up to ______ the children discover the secret cave.

A. which　 B. what　 C. hat　 D. where

In a room above the store, where a party __________, some workers were busily setting the table.
A. was to be held   B. has been held   C. will be held    D. is being held

Who ______ the fight against the H1N1 flu ______ it not been for the Chinese scientists’ great efforts?（ ）

A. could have won; had　　　　 B. would win; had　

C. would have won; has　　　　 D. would win; has

. If Newton lived today, he would be surprised by what ____ in science and technology.

A. had discovered B. had been discovered C. has discovered D. has been discovered

It was along the Mississippi River _______ Mark Twain spent much of his childhood.

A. how　　　　　　 B. which　　　　 C. that　　　　　 D. where

____ the claim about German economic might, it is somewhat surprising how relatively small the German economy actually is. 

A. To give     B. Given     C. Giving      D. Having given