fly by wings和fly with wings的区别 一个是用飞机 一个是用翅膀
_____D_____ you've come,you can stay here.
A.Because B.For C.As D.Since
He is looking ___Outof___ the window __at____ the tree.
是out of；at吗?是的
He is in danger.However we can do nothing but __watching__ him.
是填watch吗?（A.to...B.C.ingD.ed) C
The teacher asked ____D_____.
A.what they are talking about×?
B.how long he had left here√?← 应该是 How long he had BEEN left here.(我觉得 不一定是对的）
C.where he has gone×?
D.what they were doing√?
The teacher looks unhappy,doesn't he?
___A____.We made many mistakes in the exam.
A.Yes,he doesB.No,he doesn't
get enough __B____ to live in
A.homes B.space
下课了,同学们一个接一个地走出教室.
The students went out of the classroom ___one __ __by_____ __one_(in an orderly manner)_____ after class.
There is a __slight____ difference between these two words.