I have a ______ friend. He has lived in the _____ island for half a year to do some research.

下列各句中没有语病的一句是（ ）

I failed again. I wish I _________ harder.—But you _________.

Do you have a______——Yes, I do. I _______in a big clothes store.

Two tickets to Guilin, please.–Only one ticket left. Would you like _______