We Chinese are proud ______ the great success _______ the area of science and technology .
| A．of ; in | B．by ; on | C．with ; on | D．for ; in |
The teacher ______ several times, but he still didn’t understand it.
| A．explained John the sentence | B．explained the sentence for John |
| C．explained to John the sentence | D．explained about the sentence to John |
The government not only ________ the refugees（难民）houses to live in, but also _______ them with food and clothes.
| A．offered; offered | B．provided; provided |
| C．provided; offered | D．offered; provided |
— Can you give me some advice about the design?
— I think it should _______ to all ages and social groups.
| A．appear | B．appeal | C．suit | D．fit |
They are so close friends and their friendship ________ college days.
| A．dates back to | B．dates back | C．dates to | D．dates back from |
It was __________ back home after he finished the report.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t went |