Children are ____ to meet with setbacks as they grow up, so their parents don’t have to worry about it．
A．possible B．dueC．necessary D．bound
D

試題分析：句意：孩子們在長大的過程中，一定會碰到一些挫折，所以他們的父母不要擔(dān)心。be bound to 注定，一定要，be possible to 可能的 be due to由于 be necessary to是必要的，根據(jù)題意，故選D。
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