– Hey, Tony. You look so tired today.– I 11 o’clock last night for the math test.
---I _________ stay up late. ---Really? I didn’t. But I ______ working in the night.
Beijing _________a lot in the last ten years. It is one of _________ in China.
We really don’t know _________ with our problems in learning English.
They were walking ________ a forest after they swam _______ the river .
_______should not be allowed to get ears pierced.