A. To protect B. Protect C. Protects D. Protected
A. suddenly B. luckily C. widely D. lately
A. will have;won’t B. have;won’t
C. will have;isn’t D. have;doesn’t
A. that B. who C. what D. which
A. how long can humans live B. how long humans can live
C. how soon can humans live D. how soon humans can live
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