联合国第三任秘书长是（）。
A.瓦尔德海姆
B.约翰逊
C.拉吉夫
D.吴丹
参考答案：D
When Tom ______ Beijing, it is raining.
A．goes to
B．goes
C．gets
D．gets to
When water is used to fight a fire on board a ship，the effect of the weight of the water must be taken into account. How much sea water will increase the weight displacement by one ton?（）
A.64 cubic feet
B.35 cubic feet
C.100 gallons
D.500 liters
