Cars play an important role in modern life , but they also cause many problems like air pollution.
| A．should | B．can | C．must | D．will |
As a member of one world, each of us has a role _____ to make the earth a better place.
| A．playing | B．play | C．played | D．to play |
—As an old saying goes: “Opportunities favor the prepared mind.”
—Perfectly! Now ______.
| A．the chance comes | B．does the chance come |
| C．comes the chance | D．the chance did come |
Are you willing to live in an age _____ 4G technology will bring about an information revolution?
| A．where | B．when | C．whose | D．which |
—Do you know when Jim's coming?
—He _____ 9:00 a.m.
| A．had said | B．says | C．has said | D．said |
—I heard they broke up!
—______? They were well-matched in high school.
| A．So what | B．Why not | C．How come | D．What a pity |