With the rapid growth of Cyberspace, everyone should be encouraged to use ______ Internet as ______ tool, making it a trend to study in virtual schools in the future.

In America, if ________ friend has invited you to drop by anytime, it is ________ best to call before visiting to make sure it is convenient for him.

There is no doubt that holding such____ National Day parade will significantly enhance (提高) ____national pride and self-confidence of Chinese People.

The foreign guests who paid a visit to our city last week are greatly impressed by the fact that_______ people from all walks of life are working hard for_______ new Haimen.

          helicopter can take off and land straight up or down, and can also stay
still in      air.

Remember that you can have    second try if you fail    first time.

___book I read yesterday is so interesting that I want to read it___ second time.

“A Red，Red Rose”，_____romantic poem，is written by Robert Bums，quite a few of whose
works are involved in _______ nature．

The crowd stepped aside to make ________ way for the athlete who was good at playing _______ table tennis.

I don’t think the experiment is ______ failure. At least we have gained ______ experience for future success.