If you have a headache, you _______ lie down for a good rest.
| A．shouldn’t | B．had better not | C．had better | D．mustn’t |
—Why are you so happy today?
—Because I to London with my parents tomorrow.
| A．fly | B．am flying | C．have flown | D．flew |
The policeman told us __________ the street when the traffic light was red.
| A．not cross | B．didn’t cross | C．not crossing | D．not to cross |
—You should ________ your son. He works harder than before.
—Thanks, I will.
| A．praise | B．punish | C．prevent | D．beg |
She's not strong enough walking up mountains.
| A．to go | B．going | C．go | D．went |
Sally took a photo of her friends while they computer games.
| A．play | B．are playing | C．have played | D．were playing |