要首字母是a或an的短语各20个!

问题描述:

要首字母是a或an的短语各20个!
比如a number of之类的!

a little a bit a little bita lot of(=lots of)a few at homea good ideaaround the houseat the end(of)at the partyall kinds ofat weekendsat the age ofask sb.some questions ask sb.to do sth.(ask sb.not...