单项选择题

______ under a microscope, a fresh snowflake (雪花) has a delicate six-pointed shape.

A．Seeing
B．Seen
C．To see
D．To be seen
<上一题 目录 下一题>
热门 试题

单项选择题
We ll be only too glad to attend your party ______ we can get a baby-sitter.
A．so far as
B．provided that
C．unless
D．except that
单项选择题
They couldn t ______ him of his mistake.
A．advise
B．convince
C．persuade
D．believe
相关试题