—_____ is my computer game?
—It's on the bookcase. [ ]
A. What
B. How
C. Which
D. Where
答案:D
A lot of time _______ if you prepare your lessons beforehand. [ ]
A. can save
B. will save
C. be save
D. can be saved
John knocked at the door for nearly five minutes____his wife opened it.
A.when
B.before
C.until
D.as