According to the passage, which of the following is the most important cause of desertification? A.The change of climateB.The spread of desertsC.Human activitiesD.Cattle destroying trees
When all the trees in an area are cut down, _________.A.their leaves make the land richerB.the smaller plants can grow betterC.they cool the land under their leavesD.there is nothing left but sand
We can infer that men on motorcycles keep the sheep and goats away so that_________.A.they won't eat the small treesB.they won't destroy the covering of oilC.they won't drink water in the canalsD.they won't blow the sand away
That's (A) the best (B) exhibition I've never (C) seen. A.That'sB.the bestC.neverD.seen
You must take quickly (A) the test in order to (B) finish (C) in time (D) .A.quicklyB.in order toC.finishD.in time
A study (A) of the (B) difference between (C) synthetic and natural vitamins are (D) needed.A.studyB.theC.betweenD.are
He bought a ticket_________. A.and his brother did eitherB.but his brother didn't, tooC.and so his brother boughtD.and so did his brother
Don't walk too fast. I can't keep_________you. A.on toB.on withC.up toD.up with
A.accompanyB.interviewerC.dynamismD.comfortable
We expected that our team_________, but it didn't. A.will win the gameB.can win the gameC.would win the gameD.will be winning the game
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