The air in Lanzhou is getting much _____ now than a few years ago .
| A．clean | B．cleaner | C．cleanest | D．the cleanest |
Every minute about ____ babies are born in the world, so the world’s population is increasing by _____million every year.
| A．256 ; 8 | B．256; 80 | C．261 ; 8 | D．261; 80 |
Acid rain comes from _____.
| A．the river | B．the water | C．the clouds | D．the forests |
Many _____ in ______ could hear no better than 65-year-old people, for they like pop music.
| A．adults, the USA | B．adults; England |
| C．teenagers: the USA | D．teenagers: England |
Mr. and Mrs. Green work in the hospital, but they have no children. So they belong to _____.
| A．extended family | B．nuclear family | C．DINK family | D．celibatarianger |
_____ is a program to help children’s education in poor areas.
| A．Project Hope | B．Edmonton Community Service |
| C．Kids in the hall | D．China Greener |