单项选择题

Internet (has made possible) (for people to know) what (is going) on (all over) the world.

A. has made possible
B. for people to know
C. is going
D. all over
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单项选择题
(It) is easier (to talk) about a problem (than) to solve (them).
A. It
B. to talk
C. than
D. them
单项选择题
(Hard) (as) he worked, (but) Mr. Brown couldn't (keep) the shop properly.
A. Hard
B. as
C. but
D. keep
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