Professor Smith, along with his assistants, ______ on the project day and night to meet the deadline.
A. work B. working C. is working D. are working
The shopkeeper did not want to sell for ______ he thought was not enough.
A. where B. how C. what D. which
With more forests being destroyed, huge quantities of good earth ______ each year.
A. is washing away B. is being washed away
C. are washing away D. are being washed away
It was some time ______ we realized the truth.
A. when B. until C. since D. before
I knew ______ John Lennon, but not ______ famous one.
A. 不填；a B. a；the C. 不填；the D. the；a
---- Could you do me a favor and take these books to my office?
---- Yes, ________.
A. for pleasure B. I could
C. my pleasure D. with pleasure
