Parents often faced the（ ） between doing what they felt was good for the development of the child and what they could stand by way of undisciplined noise and destructiveness.
A.paradox B.junction C.dilemma D.premise
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The fireman（ ）the baby and carried him out of the burning house.
A.caught up B.seized up C.snatched up D.held up
The moist air of the Pacific Ocean brings a （ ） climate to the west coast of the United States.
A.chilly B.temperate C.modest D.compromising
When working on his novel, he was perfectly cautious not to make even a （ ） of the pen.
A.slid B.slip C.glide D.skid
Society and civilization have reached very much the same point that was reached eighteen centuries earlier; it is strongly implied that the only real difference may be that they have （ ） nuclear weapons for a slightly longer time, heeding the lesson of the past to some extent.
A.held off using B.held out for using C.been held back to use D.held on to use
We shall probably never be able to（ ） the exact nature of these sub-atomic particles.
A.assert B.inform C.ascertain D.notify