______to the national park before, Sue was amazed to see the geyser.A.Being notB.Not having beenC.Have not beenD.Having not been
It is believed _______causes insomnia.A.too much caffeine whichB.that too much caffeineC.it in too much caffeineD.too much caffeine that
(50)A.systemsB.materialsC.sourcesD.structures
(49)A.doB.makeC.getD.come
_____ from Bill, all the students said they would go.A.ExceptB.OnlyC.ApartD.Separate
(47)A.connectingB.lookingC.searchingD.linking
The policeman explained to us ______get to the market.A.howB.how couldC.how we couldD.how could we
Not until a money several years old________to exhibit signs of independence from its mother.A.beginningB.does it beginC.and beginD.it begins
"Never say that again.______"A.won't youB.do youC.don't youD.will you
There's someone at the door. ______it.A.I’m answeringB.I answerC.I’ll answerD.I answered
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