A number of birdwatchers ______in Zhalong Nature Reserve. The number of them____500.
She said she returned the book to the library.I'm sure she ________.
一Do you know why he didn’t ________ a word when he ________ to? —Because he was too nervous.
—Do you know the price of the ticket? —Yes.Each ________ ¥180.
You mustn’t go off on your own,because you ________ get lost in the mountains.
一Diaoyu Island belongs to China. 一Surely it does! We Chinese never ________ it up.