下列各句中，没有语病的一句是（ ）

Unemployment in that country is likely to remain high in 2011, and ____ for the next few years

Though invited several times, I still have some doubt ___ I can go to his birthday party[ ]

It’s a long time ______ I saw you last.—–Yes, and what a pity it is now that it will be a long time _____ we see each other again

If you’re _______ trouble, you can ask the police _______ help.