The teacher told us that light _______ faster than sound.
| A．traveled | B．had traveled | C．is traveling | D．travels |
If my lawyer ______ here last Friday, he _____ me from telling the truth.
| A．had been; would have prevented | B．had been; would prevent |
| C．were; would prevent | D．were; would have prevented |
Mr. Black is an experienced engineer , and he will be employed to us in improving our equipment .
| A．assist | B．consider | C．provide | D．offer |
—How much do you know about the 3D film technology?
—A little. Not until _______the hot movie Avatar _______ some about it.
| A．did I see; did I begin to learn | B．I saw; I began to learn |
| C．I saw; did I begin to learn | D．did I see; I began to learn |
—Mary is a(n) painter .
—So she is . She won a national award at the age of fifteen .
| A．delighted | B．gifted | C．normal | D．accurate |
Mr.Smith an imprtant part when he gave the lecture last Friday .
| A．left out | B．picked out | C．let out | D．took out |