It seems oil ______ from this pipe for some time. We'll have to take the machine apart to
A. had leaked
B. is leaking
C. leaked
D. has been leaking
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Which of the following is not tree？
A. When a person tries to help others, he must be clear that there is a real emergency.
B. When a person tries to help others, he should know whether they are worth his help.
C. A person must take the full responsibility for the safety of those in emergencies if he wants to help.
D. A person with a heart attack needs the most.
According to the author, to improve the quality of environment, it is important to______.
A. call on the public to action
B. pass related law
C. eliminate the destructive effect of science and technology
D. use better knowledge of science and technology
李白是唐朝哪个时期的诗人 ()
A. 初唐
B. 盛唐
C. 中唐
D. 晚唐
“惠王用张仪之计，拔三川之地”中的“三川”是指 ()
A. 黄河、汾水、渭水
B. 长江、珠江、淮河
C. 黄河、伊水、洛水
D. 黑龙江、松花江、辽河
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