The boys were about to go out to play football suddenly it began to rain.
| A．when | B．as | C．while | D．then |
—What a noise! I can hardly stand it.
—It __________ as if they are having a party next door.
| A．looks | B．sounds | C．feels | D．happens |
—But I don't know how to play the piano.
— __________.
| A．So do I | B．Neither will I |
| C．Me too | D．Neither do I |
He tried his best to solve the problem, __________ difficult it was.
| A．however | B．no matter |
| C．whatever | D．although |
__________ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
To their __________, young people in China, ignorant about Chinese traditional holidays, are crazy about Christmas or Valentine's Day.
| A．enjoyment | B．satisfaction |
| C．astonishment | D．relief |