单项选择题

It can be learned from the passage that about four billion years ago （）.

A．the earth was in molten state
B．the earth surface temperature was above 100℃
C．the earth surface temperature was below 100℃
D．rain water could remain on the earth

<上一题目录下一题>

热门试题

单项选择题

Student A: I am very grateful to you for taking so much trouble to explain the best way of getting there. Student B: （）.

A. What happened
B. Nice to meet you.
C. please take it easy.
D. No trouble at all.
E. Coffee, please.
F. I forgive you.
G. But he panned to.
H. Can I have the bill

单项选择题

Ⅰ PhoneticsDirections: In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the answer sheet.

A. neighbor
B. laugh
C. tough
D. cough