The teacher handed our writings back to us, ______ some necessary changes.

A. making       B. to have made    C. having made     D. made

 You must ______ that the power is off before you leave the lab.

A. check            B. know                C. decide          D. examine

 At such gatherings, people ______ are not necessarily your relatives or friends.

A. that you say hello                          B. who say hello to

C. you say hello to                          D. whom you say hello

 —We’d better go downstairs right now for lunch.

—______ They serve food 24 hours a day.

A. Take your time.                           B. No way!

C. Hurry up!                              D. It doesn’t matter.

 Walking is a nice way to relax. ______, it can help reduce body weight if you do it regularly.

A. However       B. Instead         C. Therefore       D. Besides

 Having decided to take the trip, he ______ preparing for it.

A. set up        B. set about        C. set out          D. set aside

 —You mustn’t leave your car unlocked while you are away.

—No, I ______. Please don’t worry too much.

A. can’t           B. mustn’t         C. won’t        D. needn’t

 I was caught in a traffic jam for over an hour, otherwise I ______ you waiting for such a long time.

A. will not keep    B. have not kept    C. had not kept   D. would not have kept

 —Can I help you with it?

—I appreciate your ______, but I can manage it myself.

A. advice        B. question        C. offer           D. idea

 I dislike ______ when others laugh at me in public or speak ill of me behind.

A. that            B. those           C. them         D. it