The prices of the cars are about 30% __________ and the manufacturers -考呗网题库移动版

单选题The prices of the cars are about 30% __________ and the manufacturers are almost selling their products __________ cost.

A． off； at
B． down； at
C． less； for
D． lower； on

参考答案A

解析:译文：汽车的价格大约降低了30％。汽车制造商几乎是在按成本价格销售。
介词辨析题。表示打多少折扣，通常用off，atcost这个词组表示“按成本价格，按原价”，答案为[A]。

单选题Their refusal to sign the international treaty was __________ by many countries in the world.

A． announced
B． denounced
C． renounced
D． pronounced

单选题No __________ person would spend so much money just on a meal.

A． sensitive
B． sensible
C． sentimental
D． sensational

单选题Eye contact is important in relationship because it __________ to show attention and interest.

A． assists
B． promotes
C． serves
D． tends