To make a breakthrough in his scientific research, the scientist has been making

题干

To make a breakthrough in his scientific research, the scientist has been making a(n) _____amount of effort.

A．modest	B．miserable
C．optional	D．tremendous

上一题下一题 0.85难度单项选择更新时间:2019-02-23 03:46:30

小学学科试题库

初中学科试题库

高中学科试题库