1.( )of them are not here means ( )of them are not here.
a.all some b.all both
a,all not部分否定,不都是,就是一些不是
2.how often do u go to the library?_____.
a.every few days b.every a few days c.each third day
a,固定短语,每隔几天去一次,如果选c,用every third day,每三天去一次,没有b的用法
3.what way are u thinkingof ___-rid of the flies
a.to get b.getting
a,think of a way to do
get rid of 的宾语已经有了,是the files