Question

Some scientists think that it will take __ of years to make robots do most work for humans.
A. hundreds               B. hundred                C. thousand

Answer 1

A

考查數(shù)詞的用法。固定短語hundreds of“成百上千”、thousands of“成千上萬”；如果前面沒有具體的數(shù)字，常用復(fù)數(shù)加of結(jié)構(gòu)表示不確切的數(shù)字。