The country has already sent up threeunmanned spacecraft, the most recent ________ at the end of last March.

The Great Wall runs for over 6,000 kilometres_ _________ northern China.

The trs D．to weigh

It was Sunday today, and I _____ up very early. — So you really had a good rest. [ ]

How much is _______ for a schoolbag?-Experts say students should carry_______ more than 10 or 15 percent of their body weight．[ ]