1.a little break 是泛指休息一下.
而ABD都是特指,只有one是泛指,为了跟问句一致,所以选C咯.
2.时间状语从句,用when引导,这个不用解释吧,而while一般接doing .
你可以还原该问句,
( )you heard a strange sound you were in the shop .现在选哪个,一眼就看出来了吧,还看不出来就读一遍吧.
1.a little break 是泛指休息一下.
而ABD都是特指,只有one是泛指,为了跟问句一致,所以选C咯.
2.时间状语从句,用when引导,这个不用解释吧,而while一般接doing .
你可以还原该问句,
( )you heard a strange sound you were in the shop .现在选哪个,一眼就看出来了吧,还看不出来就读一遍吧.