The students didn"t stop talking _______ the teacher came in. [ ]A. before B

题型：北京模拟题难度：来源：

The students didn"t stop talking _______ the teacher came in. [ ]
A. before
B. until
C. when
D. because

答案

举一反三

—It"s 10 o"clock now. I must go.
—It"s raining heavily outside. Don"t leave ______ it stops.

[ ]

A. since
B. until
C. when
D. because

题型：河北省模拟题难度：| 查看答案

The art club is for the club members. You can"t go in ______ you are a member. [ ]
A. unless
B. if
C. because
D. though

题型：河北省模拟题难度：| 查看答案

Tens of thousands of people have visited Expo 2010 Shanghai China ________ it opened in April. [ ]
A. for
B. before
C. since
D. while

题型：河北省模拟题难度：| 查看答案

—The skirt still looks pretty on you, ______ it is kind of out of style.
—Thank you. My parents bought it as my tenth birthday present. [ ]
A. because
B. for
C. as
D. though

题型：0117 模拟题难度：| 查看答案

The new system should be tried out first _______ it is put into use.A. before
B. after
C. when
D. while

题型：0110 模拟题难度：| 查看答案