—______ did your sister leave China?
—She______ for three years ．
| A．When, has left | B．When ,has been away |
| C．How long,has left | D．How long,has been away |
—What do you want to be in the future, Lucy?
—I want to be _____ pilot. It is _____exciting job.
| A．a; a | B．a; an | C．a; the | D．the; an |
New technology____________to stop the students from cheating in the exam last year.
A. is used B. used C. was used
--Why are the windows so dirty?
--Because we_________them for a long time.
A. have cleaned B. haven't cleaned C. didn't clean
Mr. Wang often encourages us_______close to nature and enjoy its beauties
A. get B. getting C. to get
--A big fire ______in Dehui, Jilin Province on June 3rd, 2013.
--That's too bad. I think we should try our best to prevent fires.
A. came out B. went out C. broke out