To save water, the parents told their children ________ their teeth under a running tap.
| A．to brush | B．not brushing |
| C．not to brush | D．brushing |
—Can you tell me ________ to send this postcard to New York by airmail?
—Let me check. Oh，it’s one dollar.
| A．how long it takes | B．how much it costs |
| C．who can help me | D．if there’s a post office |
—How often do I need to feed the birds?
—They ________ food every day，or they will be hungry.
| A．must give | B．mustn’t give |
| C．must be given | D．mustn’t be given |
I still remember my first teacher ________ we haven’t seen each other for
a long time.
| A．it | B．until | C．though | D．because |
—I’ve got a ticket for the basketball game tonight.
—Cool! How ________ you ________ it?
| A．had，got | B．did，get | C．were，getting | D．will，get |
—Let’s ________ some dumplings right now.
—OK. I’ll cut up the meat first.
| A．eat | B．buy | C．heat | D．make |