After class, students ______ clean the chalk off the blackboard.

A. was excepted to B. are supposed to

C. are important to D. was polite to

We'll never give up working on the experiment (实验), ______ difficult it is.

A. no matter how B. no matter how many

C. no matter what D. no matter where

My family like to travel. Mother prefers to take a bus to travel, while father ______ to travel.

A. stick to drive B. sticks to driving

C. stick driving D. sticks

Only after a year ______ to see the results of my work.

A. I begin B. I began

C. did I begin D. began

--- How do you like western food?

--- Well, it’s not bad. Now I ______ sandwiches.

A. am used to eat B. am used for eating

C. am used to eating D. used to eat

--- Excuse me, could you tell me where ______ in the group-buying?

______ Mary ______ Nancy is interested in classical music. They often go to the concert to listen to it together.

A. Both, and B. Not only, but also

C. Either, or D. Neither

Mr. Smith has taught for many years and he teaches well. All the students ______ him.

A. look forward to B. look up to

C. look up D. look on

The number of foreign students in China ______ increased.

A. has B. have C. is D. are

--- I don’t know when ______ tomorrow.

--- I will call you as soon as he ______.

A. will he come, arrives B. he will come, arrives

C. he will come, will arrive D. will he come, will arrive