He hasn’t ______ to New York ______, but he’ll go.

If he had spent more time practising speaking English before，he________able to speak it much better now.

to feel very nervous when I stood up in frontof others, but now I feel quite ______when giving a speech to the school

I think the older people must be _______ politely. —Yes. You are so kind.

There’s a rising problem with the popularity of private cars _____road conditions need _____. [ ]