单项选择题

(It is) (extremely) important (for) an engineer (to know) to use a computer.

A. It is
B. extremely
C. for
D. know
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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
单项选择题
(Either) our manager or I (are) (going to) meet you at (the) bus station tomorrow.
A. Either
B. are
C. going to
D. the
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