When I got to the cinema, the film _____ for five minutes.
| A．had begun | B．has been on |
| C．has begun | D．had been on |
.
We often talk a great deal about English language teaching, _____ that it is the learning that really matters.
| A．having forgotten | B．forgotten | C．forgetting | D．to have forgotten |
.
In the rainforest of the Amazon, 50 to 150 plant species _____ every day.
| A．have been destroyed | B．are destroying | C．are being destroyed | D．destroyed |
.
To help today’s customers make a choice, a company in New York _____a video trolley — a supermarket trolley with a video screen to display advertisement and price information.
| A．has invented | B．had invented | C．invents | D．is inventing |
.
— Which of these electronic watches do you like?
— ______of them. They are expensive and of little use.
| A．None | B．All | C．Both | D．Either |
.
It is an established fact that factory workers work better, harder, and have _____ accidents when their machines are painted orange rather than black or gray.
| A．fewer | B．few | C．more | D．less |