[填空题]______ countries have worked together to build the International Space Station.

[填空题]______ countries have worked together to build the International Space Station.

[填空题]Different countries and different races have different (11) . In China, it is important for the host to be attentive towards the guest. The host shows this by (12) that the guest’s glass is always full and that there is always (13) food in his bowl. It is considered unnecessary to ask whether the guest wants more. In contrast, in England the host may behave more informally. The host (14) places the food in the middle of the table and tells the guest to help himself. It is considered unacceptable to (15) food or drink upon a guest, so the host never gives him anything without first checking whether he wants it.

[简答题]In recent years many countries of the world have been faced with the problem of how to make their workers more productive. (Passage 3)

[单项选择]

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Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel (26) the coast. Even in the twentieth century, goods can be moved more cheaply by boat than by any other (27) of transport. These (28) make it possible for boats to travel (29) ports along the coast without being (30) to the dangers of the open. Some canals, such as the Suez and the Panama, save ships weeks of time by making their (31) a thousand miles shorter. Other canals permit boats to reach cities that are not (32) on the coast, still other canals (33) lands where there is too much water, help to (34) fields where there is not enough water, and (35) water power for factories and mills. The size of a canal (36) on the kind of boats going through it. The canal must be wide enough to permit two of the largest boats using it to (37) each other e
A. water 
B. wet 
C. soak 
D. irrigate