________ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
—I haven’t heard from Henry for a long time.
—What do you suppose________ to him?
| A．will happen | B．has happened | C．was happening | D．had happened |
The manager promised to keep me_______ how our business was going on.
| A．informing of | B．informed of | C．to inform of | D．on informing |
The first English novel _____ I read was “Gone with the Wind”.
| A．which | B．that | C．who | D．whom |
I don’t like the way_____ he speaks to others.
| A．/ | B．in that | C．which | D．of which |
My English has greatly improved , ______ I practice using it every day.
| A．until | B．unless | C．though | D．as |