Listen! Someone ________ at the door. Please go and answer it.

I find this Math problems very _____ _. I believe the students can work it out .

填入下面一段文字横线处的语句，最恰当的一句是（ ）民国时期有教授讲诗，一堂课下来，只一首一首朗诵，顶多在精妙之处停顿，连声感叹“好诗，好诗”。行家眼中，这种做法或者更贴近诗的本质： ， ， ， ， 。用分析、归纳与综合的理性思维去规训感性、直觉的艺术思维会适得其反。

For teenagers,there are always too many rules that are expected________.[ ]

must have learnt the good news of our teamwinning the football match, _____ you — Yes I _____ it up when having supperin the canteen