It may be inferred from the passage that ______.
A. the ditch was along a quiet country road
B. the accident happened on a clear warm day
C. the police helped Mr. Johnson get out of the ditch
D. Mr. Johnson had a tender wife and was well attended
查看答案
听力原文：W：My pen is not as good as the one you bought yesterday。
M：Well，but mine is worse than Tom's．
Q：Whose pen is the worst？
(9)
A. Hard to say.
B. The woman's.
C. The man's.
D. Tom's.
"Finally it gave" (Paragraph 5) means that ______.
A. Luckily the door was torn away in the end
B. At last the wrench went broken
C. The lock came open after all his efforts
D. The chance was lost at the last minute
Compared with the traditional ones, the new satellites ______.
A. need long start-up times
B. are low-cost and small-sized
C. are very hard to operate
D. collect more information in orbit
Why is it the biggest challenge now to find ways to bring the satellites back to the earth
A. Because it is too hard.
Because there are no such scientists that can do so.
C. Because major highways of space junk could gradually increase as CubeSats become more common.
D. Because kids can't do that.
微信支付 
支付宝支付