When you are home, give a call to let me know you ____ safely.

A.are arriving　　　 B. have arrived　　　　 C. had arrived　　　　　 D. will arrived

Excuse me. I ____ I was blocking your way.

A.didn't realize　　　 B. don't realize　　　　 C. haven't realized　　　　 D. wasn't realizing

Mary went to the box office at lunch time, but all the tickets ____ out.

A.would sell　　　　 B. had sold　　　　　 C. have sold　　　　 D. was selling

John was given the same suitcase his father and grandfather ____ with them to school.

A.took　　　　　　B. had taken　　　　　 C. were taking　　　　　 D. would take

When I talked with my grandma on the phone, she sounded weak, but by the time we ____ up, her voice had been full of life.

A.were hanging 　　　　 B. had hung 　　　　　　　 C. hung　　　　　　　　 D. would hang

--I've got to go now.　　　　　　　

--Must you? I ____ you could stay for dinner with us.

A.think　　　　　 B. thought　　　　　 C. have thought　　　　 D. am thinking

 Progress ____ so far very good and we are sure that the work will be finished on time. 

A.was                         B. had been                 C. has been                 D. will be

--You speak very good French!

--Thanks. I ____ French in Sichuan University for four years.
A. studied　　　　　　B. study　　　　　　 C. was studying 　　　　 D. had studied

Over the past decades, sea ice ____ in the Arctic as a result of global warming.

A. had decreased　　　　 B. decreased　　　　 C. has been decreasing 　　 D. is decreasing

The population of Jiangsu ____ to more than twice what it was in 1949. The figure is now approaching 74 million.

A.has grown　　　　　B. have grown　　　　　　　C. grew　　　　　　　 D. are growing