Could you help me with housework _____you are free today？（ ）
A．sinceB．thoughC．unlessD．until
It shouldn't take long to clear up after the party if we all volunteer to help．
That's right．_________________________．（ ）
A．Many hands make light work．
B．Something is better than nothing．
C．The sooner begun，the sooner done．
D．Practice makes perfect．
Today's young people can't live without smart phones．
They keep their hands on the phones whether they go，even while they______meals．（ ）
A．haveB．are having
C．were havingD．will have
Have you watched the latest TV program Running Man？
Of couurse! It's popular with__________the young________the old．（ ）
A．either； orB．neither； nor
C．both； andD．not； but
To save energy，we should_________the electricity when we don't use it．
I agree，you are really a greenerperson．（ ）
A．shut upB．shut offC．take awayD．take off
China's 23rd Beidou Satellite__________into space on June 12，2016．
As Chinese，we are proud of it．（ ）
A．has sentB．is sentC．will sendD．was sent