Don’t make a noise! They _______on a physics problem now.
| A．will work | B．are working | C．worked | D．have worked |
If it _______ sunny tomorrow, I ______ the Great Wall.
| A．will be, climb | B．is, climbing |
| C．will, am climbing | D．is, am going to climb |
There is going to _______ a party in our school.
| A．have | B．has | C．is | D．be |
— Mum, I’ m going to Ann’ s party this evening.
—_______.
| A．Why not | B．Have a good time | C．Come back early | D．Good idea |
— ______ will you stay in America?
— About two months.
| A．How many | B．How often | C．How long | D．How |
Taking ______ exercise and eating ______ food can make you keep thin.
| A．more; less | B．more; fewer | C．less; more | D．fewer; less |