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
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单项选择题
There are two kinds of computers (there), both (of them) are (widely) (used) today.
A. there
B. of them
C. widely
D. used
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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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