—Miss Smith once _____ music in Africa for eight years and now is an actress.
—No wonder I often hear her sing in the garden.
| A．has taught | B．was teaching |
| C． taught | D．had been teaching |
The river is said __________ in a fire during the past 10 years.
| A．to have polluted | B．it has been polluted |
| C．to pollute | D．to have been polluted |
After the earthquake, we can see the ________of the village.
| A．remain | B．ruins | C．damage | D．destroy |
The Group of Eight (G8)________the eight richest countries in the world.
| A．is consisted of | B．is made up | C．consists of | D．made up of |
It is obvious to the students ______ they should get well prepared for their future.
| A．as | B．which | C．whether | D．that |
I earn 50 dollars a week, _______ she earns 80 dollars.
| A．as | B．when | C．while | D．since |