________, he had to escape to the USA because a war broke out.
| A．In his thirty | B．In his thirties |
| C．In his thirtieth | D．In his thirty’s |
－________ have you been like this?
－Three days.
A. How long B. How far C. How many
You’d better not read ________ the sun. It’s bad for your eyes.
A. on B. in C. at
Pop music often comes and goes ________.
A. slowly B. quickly C. loudly
―Would you mind ______ me how to swim?
―Not at all.
A. teach B. to teach C. teaching
I’m going to play_______ football this afternoon.
A. a B. / C. the