Question

【题目】If you have trouble pronouncing these words, you can repeat them over and over again　　　you are comfortable with them.

A. unless B. if C. until D. while

Answer 1

【答案】C

【解析】

试题句意为：这些词如果你发音有困难，你可以重复发几次直到你适应它们。unless：除非、如果不， if ：如果、是否， until ：直到……， while：当……时候。根据语境可知应选C。