单项选择题

Professor Johnson is said some significance ______advance in his research in the past year.

A．having made
B．making
C．to have made
D．to make
<上一题 目录 下一题>
热门 试题

单项选择题
The remarkable______ of life on the Galapagos Islands inspired Charles Darwin to establish his theory of evolution.
A．classification
B．variety
C．density
D．diversion
单项选择题
After seemed an endless wait______, it was her turn to enter the personnel manager' s office.
A．that
B．there
C．what
D．it
相关试题