Since the beginning of the vacation，I______ across the country，and my next stop is the Wuyi Mountains．
| A．had traveled | B．will travel | C．have been traveling | D．was traveling |
—Can you keep an eye on my bag? I need to go to the washing closet.
— __________. It'll be safe with me.
| A．It's my pleasure | B．Never mind |
| C．Go ahead | D．Forget it |
—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 |