问题：
It"s less expensive to buy goods in ___, but you"d better examine the ___ before buying them.
[ ]
A. quantity ; quality
B. quantity ; quantity
C. quality ; quality
D. quality ; quantity
It"s less expensive to buy goods in ___, but you"d better examine the ___ before buying them.
B. quantity ; quantity
C. quality ; quality
D. quality ; quantity
[ ]
A. quantity ; qualityB. quantity ; quantity
C. quality ; quality
D. quality ; quantity
参考答案：