From facts, scientists have ________ that more energy is being absorbed from the sun, throwing the earth's energy "out of balance".
| A．confirmed | B．concluded |
| C．concentrated | D．conflicted |
I don’t like ___ of the three books. Only one in particular has attracted my attention.
| A．either | B．both | C．all | D．Any |
Look before you leap! You have to ______the costs of the new system against the benefits it will bring.
| A．weigh | B．match | C．defend | D．Fight |
If you have a job, ________ yourself to it and finally you’ll succeed.
| A．do devote | B．don’t devote | C．devoting | D．not devoting |
_________, so he is afraid of dogs .
| A．Having been bitten twice | B．Bitten twice |
| C．After he has been bitten twice | D．He has been bitten twice |
Asiswidelyacknowledged,playingoutsidehelpschildrenlearnthroughcuriosity, which , _ __, promotescreativity.
| A．inbrief | B．inturn | C．inconclusion | D．inreturn |