The visitors         our factory two days ago.
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A
got
B
reached in  
C
arrived   
D
reached
推荐题目
 Mary sings English songs well and ______.
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A
Jane does too
B
either does Joes
C
so Janes does
D
so does Jane
You will fall behind others         you work hard.
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A
until
B
when
C
after
D
unless
—What’s the matter with you? You look so worried.-- I don’t know ___________ the problem.
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A
what to solve
B
how to solve
C
to solve what
D
how can I