Atlanta, as well as many other big cities, once again becoming one of the commercial and cultural centers of the USA right now.
| A．is | B．are | C．has been | D．have been |
. — Why were you so late for work today?
— ____ to the office was not very easy this morning because of the traffic.
| A．Drove | B．Driving | C．I drove | D．What I drove |
. ____ and out of breath, we reached the top of the mountain and stopped ____ the beautiful scenery.
| A．Tiring; to admire | B．Being tired; admiring |
| C．Tired; to admire | D．Tired; admiring |
. As a teacher, he has never given his students so difficult a problem ____ they can’t work out.
| A．if | B．that | C．when | D．As |
. — I don’t know ____ to join the army or to find a job.
— Why don’t you ____ your parents’ advice?
| A．if; take | B．if; follow | C．whether; give | D．whether; seek |
. Whether ways will be found to stop pollution or not is just ____ worries the public.
| A．why | B．which | C．that | D．What |