---Excuse me, is this seat______?
---yes. Go ahead.
A. occupied B. flexible C. temporary D. vacant
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
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
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
---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
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
