The littleboy’s mother told him she would be back___ an hour,but she didn’t. [ ]

Could you tell us how long asleep?—For about two hours.

Is this ________ Chinese book?—No，it’s ________ English book.

Let’s go to Hainan on vacation. -Oh, no. I have to Hainan several times.

Mum,my little sister is crying all the time. ——Mary,be _________!She feels sick.You should take good care of her.