Plastics is a kind of （ ） which is widely used in industry.

Neither Bill nor his parents（ ）at home.

It is necessary to () a large vocabulary in learning a language.

According to an International Energy Agency study, if consumers chose those models that would save them the most money over the life of the appliance, they’d cut global residential power consumption (and their utility bills) by 43 percent.

While watching TV, you should take the opportunity to share your own____ with your kids.

To help readers understand how climate can change, the writer uses _________.

()Sunday, the library doesn’t open.

We can’t ()one to change the habits of a lifetime in a short time.

He had his book () at his own expense.

The effect of a volcanic eruption on climate may be to make it_________.

How beautifully she sings! I have never heard （ ） voice.

Scarcely had they settled in their seats in the cinema （ ） the film began.