【单选题】
There have been（）medicine in the last 50 years.
A、great advancesin
B、a great advancein
C、great advanceon
D、a great advanceon
查看正确答案A、Has there been B、Have there been C、Has there D、Have there
搜题
更多“There have been（）medicine in the last 50 years.”相关的问题
第2题
A、More than ever before B、In the past, there have never C、Never before have D、Formerly, there never were
第5题
A、Clamps have been used up. B、Lashing wires have been used up. C、Twist locks have been used up. D、Turnbuckles have been used up.
第6题
A、have been largely achieved B、have largely not been achieved C、have been achieved in some significant areas D、have not been achieved at all
第8题
A、have been steadily increasing B、has been steadily increased C、has been steadily increasing D、have been steadily increased
