Looking at old photographs of yourself on social websites can improve your mood, and this finding _______ previous researches, which suggested otherwise.

Another cup of tea— No, thanks. I _______ be off. My mom is waiting for me at home .

In the middle of the room there is a ______ table, with eight chairs around it.

Hi, Tracy. Would you like to go to thecinema tonight—— ________, James, but I have to work.

Measures have been taken to fight ________recurring food safety problems, but there is still a long way to go before China can rid itself ________ these issues.