I’m glad you’ve made great progress so far. Keep it up______ you must be successful.

A. and B. while C. so D. or

---It_____ for a whole week. I think it’ll stop soon.

---Hard say. We’re getting into the rainy season now.

A. has rainedB. has been raining

C. is raining D. will rain

The reason ______ Tom came to attend the meeting was ______ he was an expert in this field.

A. why; that B. why; whether C. that; why D. why; because

When you arrive at your job in the morning, let the first thing you say_____ everyone’s day

A. to brighten B. brightening C. brightened D. brighten

China's first moon rover, Yutu, or Jade Rabbit touched the lunar surface at 9:14 a.m.on December 14,2013, ________deep trace on the loose lunar soil.

A. left B. leaving C. Having left D. To leave

---Excuse me, is this seat______?

---yes. Go ahead.

A. occupied B. flexible C. temporary D. vacant

--The mistake_____, I had been more careful.

---But you weren’t at that time.

A. might have avoided B. would avoid

C. would be avoided D. might have been avoided

David, _____ I have been sharing a dorm for more than two years, is quite a funny guy.

A. of whomB. with whomC. in whom D. from whom

Success belongs to those who work hard. I firmly believe that, _____my own efforts, I can make it.

A. showing offB. leaving outC. relying on D. making up

Please lock the door;______, bring the umbrella to me. It looks as if it is going to rain.

A. as a result B. in return C. in addition D. as well