By __________ a cheaper material for t-考呗网题库移动版

单选题
By __________ a cheaper material for the steel in our products, we can greatly reduce
manufacturing costs.

A． substituting
B． replacing
C． alternating
D． displacing

参考答案A

解析:
句子表示“用更便宜的材料代替钢铁”，意为“用A代替B”的词组substitute A for B放在空格处的句意最自然，故选A。

单选题
If your computer__________ experience any problems within the warranty period, you can
take it to an authorized repair center free of charge.

A． will
B． should
C． had
D． would

单选题
All of the machinery must be carefully inspected before production at the plant is allowedto__________

A． inhibit
B． comply
C． motivate
D． proceed

单选题
If you have not received __________ of your order within two business days, please contact
our customer service center.

A． confirmation
B． resignation
C． preparation
D． expectation