.It was obviously that the man ______ driving on the free way for almost an hour when he ______ that he must come back.

The audience, ________ , enjoyed the performance.

It _________ there is a disaster _________ people will think much of the safety.

My grandparents asked me to go and see them whenever______.

. ______ is no possibility _____ Jack will win the first place in the competition.

________________________, and the problem would be straightened out（解决）.

____________, I wouldn’t have finished my homework.

Further space exploration has been _______ with the rapid development of China’s science and technology.

—What about putting some pictures into the report？—      A picture is worth a thousand words.

Carl Linnaeus made great contributions to ________ plant species.

.It is the first time the students ________ to Hyde Park.

 I don’t think ____ is any need for a guide on our journey.

No sooner _____ back to the kitchen than the doorbell rang.

I don’t know _________.

Jack must be helping his grandma to water the flowers,______?

The little boy who got lost decided to remain _____ he was and waited for his dad．

 It was Alice and her friends who helped the homeless old woman,______?

 He felt _______ to remind the public to protect the environment.

____ troubles me most right now is____ I can’t remember where I have put my car keys.       

--- I’ll have an interview for the job at that school, and now _______.---Take it easy. I’m sure you’ll succeed.