It seems oil ______ from this pipe for some time. We' 11 have to take the machine apart to
A. had leaked
B. is leaking
C. leaked
D. has been leaking
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What is the total amount of postage required to mail the package？
A. $5.45
B. 1
C. 0.95
How did the man find out about the room？
A. From the school housing office.
B. From a newspaper advertisement.
C. From his friends at school.
Where is Fred now？
At lunch.
B. At the office.
C. In class.
太平天国起义之所以是中国农民战争的最高峰，最主要是因为()。
A. 其规模和延续时间均属空前
B. 建立了与清政府对峙的政权
C. 制定了比较完整的革命纲领
D. 对封建王朝的打击空前沉重
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