____ does your friend come to China?—”Once a year.”[ ]

I’m still working on my project.—Oh, you’ll miss the deadline（截止期限）. Time is________.

6. So far, most of the work by others, it’s your turn to do the rest of it.

Can you play the guitar?— No. I _ ___. I can play the violin.

Is this your bicycle, David? —No, it’s not . It’s Helen’s.