_________, the forest fire would have been discovered much earlier.
| A．But for their care | B．If they were careful |
| C．Without their care | D．Had they been more careful |
With new technology, pictures of underwater valleys can be taken ____ color.
| A．by | B．for | C．with | D．in |
The young dancers looked so charming in their beautiful clothes that we took ____pictures of them.
| A．many of | B．a large amount of |
| C．a plenty of | D．masses of |
Playing on a frozen sports field sounds like a lot of fun. Isn’t it risky, ______?
| A．though | B．also | C．either | D．too |
Some don’t agree to the plan, while I’m out of ____ opposed to it.
| A．those who | B．who | C．those | D．that |
You may depend on ____ that they are of much value.
| A．that | B．it | C．these | D．them |