单项选择题
There have been（）medicine in the last 50 years.
A.great advancesin
B.a great advancein
C.great advanceon
D.a great advanceon
点击查看答案&解析
相关考题
-
单项选择题
Would you mind（）us how old you are?
A.tell
B.to tell
C.telling
D.to telling -
单项选择题
50% of the people（）for the survey were female.
A.were questioned
B.who questioned
C.who were questioned
D.question -
单项选择题
There are many cities（）very fast.
A.expand
B.which expand
C.which expanding
D.to expand
