—What about the student in your class, Mr. Wang?—The doctor said that          sleep caused him poor memory and poor concentration.
#14177
A
lacking of
B
lacked in
C
lacking
D
lack for
推荐题目
Do you know how much that _____?
#12803
A
adds
B
adds up
C
adds to
D
adds up to
We allow     in the woods but anyone is forbidden      here.
#13424
A
to camp; to smoke
B
camping; smoking
C
to camp; smoking
D
camping; to smoke