Question

Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.

A．to; other than

B．by; rather than

C．to; rather than

D．by; more than

Answer 1

C

试题分析：原句意思，不幸的是，这份研究局限于提高经济利益，而非环保。be limited to 局限于 other than 不同于rather than 而不是 more than 多于，故选C。
点评：解答此类题型要先理解题干要表达的意思，再分析各个选项中词组的词义，从中选取适合语境的一个。在平时的学习中，要重视对词组的总结和记忆。