— _______the door, please.
—Come in please. The door _______.
| A．Be open; opens | B．Be open; is opening |
| C．Open; opens | D．Open; is open |
The Jiangs have lived in the city of Nantong since__________.
| A．ten years | B．last summer |
| C．they buy a flat | D．five months later |
I found _______ difficult to work out the problem.
| A．it | B．it’s | C．that | D．this |
The Greens used to live in London and now they ________ in Beijing.
| A．used to live | B．are used to live |
| C．are used to living | D．are used for living |
The train was travelling _______ low speed at that time.
| A．by | B．in | C．at | D．with |
— Have you ever been to Sanya? — Yes, ________already.
| A．sometimes | B．some time |
| C．sometime | D．some times |