对下列加点词的意义和用法的分析，正确的一项是(　　)①穷且益坚 ②若属皆且为所虏③宾主尽东南之美 ④臣之壮也，犹不如人

It is definite that new digital mobile phones have less radiation, but that does not _____ mean that they shouldbe used without caution [ ]

The police managed to gain throughan upstairs window

Which sunglasses should I choose today—I think the red ones. They _____nice on you.

The number of private cars in urban areas should be limited ___________the number of public buses should be increased