Have you ever been to the square was built last year?

40．I don’t remember how many years ago_________people began to growpine apples here.

___ in a foreign company for fiveyears. Still, I don’t regret giving up the well-paid job.

I wish to thank Professor Smith，without________help I would never have got this far.(2012·天津，7)

You could have walked here.—Yes. A taxi ___________ necessary.