-When __________ you __________ this book? -About 3 years ago.A. do, wrote B. did, wrote C. did, writeD do write
The Blacks ______ dinner when I knocked at the door. A. is having B. are having C. were having
I don’t think she ______ her homework in 2 hours. A. finishes B. finishing C. will finish
I believe that there will be _____ pollution and _____ trees. A. fewer; more B. less; more C. fewer; fewer
--- Would you please tell me_____ the timetable (时间) has changed? --- Because the students should have a rest at noon. A. if B. when C. why
If it_____ sunny tomorrow. I___ fishing. A. is; go B. will be; go C. is; will go