单项选择题

To ______ the temperature of the new machine, the researchers had to work for hours.

A．turn
B．measure
C．find
D．investigate
<上一题 目录 下一题>
热门 试题

单项选择题
When we got to the station, we were so sorry to find that the train was ______.
A．taking up
B．taking off
C．pulling away
D．pulling out
单项选择题
You have to be very quick, ______ you'll miss the last train.
A．but
B．or
C．and
D．so
相关试题