Question

Don't try to get off the bus ____it has stopped

选择题
①Don't try to get off the bus ____it has stopped
A,while B,as C,since D,before

②We'll go and see the patient ___we are busy
A,even if B.for C.if D.while

③---you understang this rule,you will have no further difficulty
A,once B,at once C,Only D,only then
希望能帮我解释一下，谢谢！！

Answer 1

1.D
在公共汽车没有停之前不要试着往下跳
2.A
即使我们很忙，也要去看看患者。
3.A
如果你了解了这个规则，就不那么难了。

Answer 2

①Don't try to get off the bus ____it has stopped
D,before

②We'll go and see the patient ___we are busy
A,even if

③---you understang this rule,you will have no further difficulty
A,once

Answer 3

D A A

Answer 4

1. D
2. A
3. A