—The country has already sent up an unmanned spacecraft to the moon.
—Yes. Chang’e I to the moon last October.
| A．has been sent | B．has sent | C．was sent | D．sent |
This famous drawing is sold ____ 10,000,000 dollars.
| A．in | B．by | C．with | D．at |
I can hardly work out the answer _____ this difficult question.
| A．of | B．to | C．in | D．for |
I got a letter this afternoon. It was ____ my foreign friend.
| A．from | B．in | C．in | D．at |
I’m all ____ sea and I’ve no idea how to fix my pencil box.
| A．in | B．on | C．at | D．off |
We built this factory ______ top speed and minimum(最少的) cost.
| A．in | B．at | C．with | D．on |