三道高中英语单选.
问题描述：
三道高中英语单选.
几道英语单选
1.In China,students____how to clean room since they are little.
a.were taght b.taught c.have been taught
2.one activity of the festive is the apple hunt _____student try to find the hidden apples.
which?where?whose?
3.It's uncertain____the city will become safe with blooding conflicts.
whether?that?what?
答
1.选C因为有since所以应该用完成时,排除了A、B2.
2.which因为这个所填的词是要来修饰前面的hunt
3.that固定的句型it's adj. that……