Question

【题目】It cost them more than ________ dollars to finish the project.

A. billion B. billions

C. billions of D. one billion

Answer 1

【答案】D

【解析】

句意：完成这项工程花了他们十亿多美元。A. billion十亿；B. billions十亿，复数；

C. billions of数十亿……，后加名词的复数；D. one billion十亿。one billion dollars表示十亿美元。根据题意，故选D。