-- I"d like to invite you to a party tomorrow evening.-- Thank you, but ______ I

题型：不详难度：来源：

-- I"d like to invite you to a party tomorrow evening.
-- Thank you, but ______ I"ll be free I"m uncertain.

A．while

B．if

C．when

D．whether

答案

解析

略

举一反三

I had just finished all my homework and was about to go to bed the phone rang.

A．when

B．until

C．while

D．before

题型：不详难度：| 查看答案

30. Barack Obama told millions watching him that his grandmother’s influence on _______ he is and the way he views the world was significant.

A．how

B．who

C．where

D．which

题型：不详难度：| 查看答案

12. It is _________he often wins medals _______makes his parents proud of him.

A．what; that

B．that; that

C．that; what

D．/; that

题型：不详难度：| 查看答案

It seemed only several minutes _______ he finished this painting .

A．after

B．before

C．when

D．until

题型：不详难度：| 查看答案

I’ll lend you my car _______ you return it intact.

A．so far as

B．as long as

C．unless

D．until

题型：不详难度：| 查看答案