________ 200BC, the Silk Road, which was the route for trade between the East and the West, was in use.

----- Now that you like the portable personal computer so much, why not buy one? It is of great use to your work. ---- Well, I can’t afford _____ computer at present．

－In what way will you use your portable computer? －I’ll use it ______ for giving lectures at conferences at home and abroad.

However _____ they are designed, pens should function as a tool to write with.

Look, dark clouds are gathering. It is ______ to rain soon.

I could hardly tell the twins apart because their appearances are only ____ different.

. The English magazine is _______ easy; I can go through the articles without much difficulty.

You must attend the meeting ____ at ten o’clock, as it is scheduled—not a minute early or late．

When the great man arrived, the club’s manager picked him up _____.

The earthquake damaged many houses and bridges; ______, it caused over 2,300 deaths. 

It is most _____that the environmentalists will come to the area to investigate the possible damage caused by the serious pollution.

This question is ______ easy, all the students can answer the question.

 There is a saying which _______like this:, “Still waters run ______.”

Nuclear science should be developed to benefit the people _____ harm them.

His parents，_________，did not look after him very well—the elbows of his jacket were patched and his boots were badly worn.

To be an astronaut, you must not only be strong in mind, but also be sound mentally and___.

_____ he graduated from college, he became a success in business. 

The boys marked ____ a football court on the playground. 

My goodness, look at the time! It’s nine o’clock already and I’m __________ at breakfast.

It’s______kind of you to take so much trouble with me.