You cannot imagine what great trouble I took ______ your house.
| A．to find | B．finding | C．found | D．having found |
________ I can see, there is only one way to solve this problem.
| A．As far as | B．Even if | C．As long as | D．As soon as |
We all do more speaking , even when we have a break after class .
| A．now and then | B．by and by | C．step by step | D．more or less |
Zhang Hong is said by heart 2000 words up to now .
| A．that she has learned | B．to have learned |
| C．to learn | D．having learned |
They really have a great time too , designing everything , drawing the blue prints , the angles and so on .
| A．looking out | B．taking out | C．finding out | D．figuring out |
—Was it in 1969 the American astronaut succeeded landing on the moon ?
—Yes , that’s right .
| A．when ; on | B．that ; on | C．which ; in | D．that; in |