The scientists are studying the effects of human activities______the environment.
| A．in | B．at | C．on | D．with |
Jack asked John ______ when he met him in the street.
| A．he was going where | B．where he was going |
| C．where was he going | D．was he going where |
Though it was the first time that I ______ the small town, I fell in love with it at once.
| A．was visiting | B．visit | C．have visited | D．had visited |
After ______ series of unsuccessful attempts, he has finally passed ____ driving test.
| A．the , the | B．a, the | C．the , a | D．/ , a |
She was always ______, even when things were at their worst.
| A．attractive | B．optimistic | C．pessimistic | D．frightened |
—How about your interview, Tom?
—I’m confident that I have made a good______ .
| A．effect | B．view | C．attraction | D．impression |