It _____ four years since we ______to learn English.
| A．Is , begin | B．has been , began | C．has, been | D．had been ,began |
Sir, you should__________ at the red light．--------Do you remember?
| A．stop | B．have stopped |
| C．not have stopped | D．stopped |
Sally took a photo of her friends while they computer games.
| A．play | B．are playing |
| C．have played | D．were playing |
When I came here just now, I saw he _______with a black and white dog in the garden.
| A．play | B．to play | C．was playing | D．plays |
—You were out when I dropped by your house.
— Oh, I_________ in Zhongbai Supermarket with my parents.
| A．was shopping | B．had shopped |
| C．am shopping | D．have shopped |
—I forgot to bring my dictionary. Could I use yours? — Yes, you _______.
| A．can | B．must | C．could | D．should |