Tom with his friends ______ volleyball since three o'clock.
| A．has been playing | B．is playing | C．have been playing | D．have played |
— I don’t know whether I should go abroadornot, Mum.
— I leave _______ to your own judgment whether you should do it.
| A．that | B．it |
| C．this | D．what |
_______ is well known _______ Hong Kong returned to China on July 1st, 1997.
| A．It, that | B．As, / |
| C．As, as | D．It, which |
. It used to be thought _____ the Earth was flat.
| A．as | B．when |
| C．since | D．that |
He made _____ known to his friends that he didn’t want to enter politics.
| A．that | B．it |
| C．himself | D．him |
“________, sir？” “No. Go ahead.”
| A．May I use your dictionary |
| B．Do you mind if I use your bike |
| C．Would you mind opening the window |
| D．May I have a look at your new book |