A:though
B:never
C:hardly
D:not only
袋子中装有2个红球和5个白球,这些球除颜色外均相同.在看不到球的条件下,随机从袋中摸出一个球,则摸出白球的概率是( )
用方框中所给短语的适当形式填空
have a look at,take off,look for,take care,get on
____they____playing sports at weekends