She says that she’ll have to close the shop _______ business improves.
A. if B. or
C. unless D. because
The Browns had a party with their neighbors yesterday. _______ all enjoyed themselves.
A. We B. You
C. Them D. They
Liu Xiang announced the retirement (退役) in Shanghai _______ May 17, 2015.
A. in B. on
C. at D. since
I think you can have a __________ try though you have tried twice.
A. third B. three
C. two D. Second
---Is this _______ iPhone 6s?
---No, it isn’t. Ask Tom. He’s just lost______________.
A. yours; his B. your; his
C. your; hers D. yours; hers
Look at ______ boy wearing a brown hat. Is he _________ university student?
A. the, a B. a, an
C. the, an D. a, a
