— Has Jack finished his homework yet?
— I have no idea；he ＿＿it this morning.
| A．was doing | B．had been doing | C．has done | D．did |
—What do you think of the film Frozen?
—Cool! Never before ____ a better one.
| A．had I seen | B．I have seen |
| C．have I seen | D．I had seen |
____ I saw him, I knew he was the man the police were looking for.
| A．Previously | B．Instantly |
| C．Accurately | D．Especially |
Most of the taxi-drivers say what they earn every day actually can hardly ____ the cost of their life.
| A．cover | B．afford | C．include | D．contain |
—Look! What are the Browns busy with?
—Well, Mrs Brown is cutting the grass; ____, her husband is planting the roses.
| A．rather | B．instead | C．thus | D．meanwhile |
As we know, fresh air and proper amounts of exercise can____ good health.
| A．link to | B．contribute to |
| C．depend on | D．concentrate on |