—How ___ is it from Xi’an to Dunhuang?—It’s less than 3 ___ flight.
| A．long, hour’s | B．far, hour’s |
| C．long, hours’ | D．far, hours’ |
— You seem familiar with Mr. John?
—Of course, we _________ together for three years in the 1990s.
| A．have worked | B．were working | C．are working | D．worked |
—_________ valuable advice you gave me! — I hope it can help.
| A．How | B．What | C．What an | D．What a |
The song sounds beautiful and it makes me _________ my hometown.
| A．laugh at | B．write to | C．think of | D．find out |
—I can't decide which book to read. —_________ you read the book review?
| A．Why not | B．Let's | C．Why don't | D．Perhaps |
I think Jack does his homework _________ than anyone else in his class.
| A．careful | B．more carefully | C．the most carefully | D．more careful |