A. need have doneB. must have doneC. can have doneD. mi……

单项选择题But for their help, we（）the program in time.

A. can not finish
B. will not finish
C. had not finished
D. could not have finished

单项选择题—I wonder how much you charge for your services. —The first two are free（）the third costs $30.

A. while
B. until
C. when
D. before

单项选择题My parents don' t mind what job I do（）I am happy.

A. even though
B. as soon as
C. as long as
D. as though

单项选择题—What did you do with your car —I lost my key, so I had to（）it in the park.

A. lock
B. repair
C. leave
D. pass

单项选择题—It's $ 500, but that is my last offer. —OK, it is a（）.

A. cost
B. price
C. reward
D. deal

单项选择题—Could you look after my garden while I'm away —（）.

A．With pleasure
B．Hold on please
C．I agree with you
D．That’s a good idea

单项选择题课堂教学中，经常出现教师在学生不注意参与学习时突然加重语气或提高声调的现象，教师采用这种手段的目的是为了引起学生的( )。

单项选择题美国心理学家桑代克提出了迁移的( )。

单项选择题写作、阅读、运算、解题等所属的技能类型是( )。

单项选择题我国现代学制建立于( )。