题目内容

In Britain, AIDS tests are now _________ on all people who offer to become blood donors.

A. residential
B. performed
C. primarily
D. ranged

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Rents in ____________ areas are lower than in the business district.

A. residential
B. performed
C. primarily
D. ranged

We’re ___________ concerned with keeping expenditure down.

A. residential
B. performed
C. primarily
D. ranged

There was nothing () about her physical appearance.

A. residential
B. performed
C. unusual
D. ranged

There are ___________ differences between the two types of materials.

A. residential
B. substantial
C. unusual
D. ranged