问题
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There is always the ____of an earthquake in this region, but so far there has been no sign
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—Will Tom recover? —Right now there is no way______.A.of knowingB.to be knownC.for knowing
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I expect the orange juice ______ undrinkable because it has been put there for several mon
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The strike has been on for half a year;______ there is a severe decline in production.A.ac
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No one has been able to prove that fish is _____ better for the brain than many othe
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He_______for her for onehour by the time she arrived there. A.has been waiting B.has waite