题目内容

they are invented to be very smart, robots still can’t replace humans（）

A If only
B Even though
C As if
D Just as

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Do you have any idea about how many companies in the office building（）

A） there are
B） are there
C） there is
D） is there

Generally speaking, you should arrive at the airport with plenty of time（）

A sparing
B to spare
C spare
D spared

Do you think the new engineer can help me my operating skills（）

A. improves
B. improved
C. improve
D. has improved

If I they were on sale online, I wouldn’ t have bought the traveling bags in this store（）

A） know
B） knew
C） had known
D） have known