单项选择题

There is a computer system （）the company is experiencing problems.

A. with which
B. as which
C. such as
D. for such

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单项选择题
（）their luggage, the tourists hurried to the airport.

A. Packed
B. After packed
C. Having packed
D. Packing
单项选择题
Usually there is（） traffic in the streets on weekdays than on Sundays.

A. less
B. little
C. few
D. fewer
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