Many kids ________ the net bar, and _____had a bad effect on their studies.

The country has already sent up three unmanned spacecraft, the most recent__at the end of last March.

He has been talented at designing and creating things________ he was young

With the development of science and technology,there is no doubt________Chinese astronauts will landon the moon in the near future.[ ]

Mr. Smith was _______ of the _________speech.