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 |
The conference aims to develop business and let people think about ______ they can have a
positive influence on the planet．
| A．why | B．that | C．what | D．how |
—Can I ask you a few straightforward questions about yourself？ —No problem．I like ______ when people are open and direct．
| A．that | B．this | C．it | D．them |
—Do you have Mary's address?
—Sorry, I don't have it ______ me at present．
| A．to | B．on | C．for | D．from |
—Hi, David, I heard you had an accident this morning．
—Yes．Luckily, I hit the brakes in time ______ I would have been injured badly．
| A．and | B．but | C．or | D．so |
They went on well at first but eventually everything ______ they had worried about happened．
| A．which | B．what | C．that | D．when |