单项选择题

A bottle weighs more after air is put in. ______ proves that air has weight.

A. We
B. Which
C. It
D. What
<上一题 目录 下一题>
热门 试题

填空题
The report showed us very (clear) ______ bow the plane crashed.
单项选择题
______ in ancient times, the book still appears to readers today.
A. Though written

B. It was written
C. Though it written

D. Written it was
相关试题