As you can see, we need the equipments, ___________ are necessary to make the project move on.
The tiger, once a ____ animal to humans, is now ____ of disappearing on the earth.
We shouldn’t spend our money testing so many people, most of ____ are healthy.
I won’t see the film tonight. I am busy. ______, it is raining cats and dogs.
Computersin offices and homes since 1970s.
More attention must be paid the endangered animals..