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【多选题】
下列选项中，关于类的继承说法正确的是A.
一个类只能有一个直接父类
B.
多个类可以继承一个父类
C.
在 Java 中，多层继承是可以的，即一个类的父类可以再去继承另外的父类，例如 C 类继承自 B 类，而 B 类又可以去继承 A 类
D.
Java 允许多重继承
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反馈参考答案：
举一反三
【单选题】If you ________ hard, you ________ in the exam.
A.
worked/ wouldn't have failed
B.
had worked/wouldn't fail
C.
had worked/wouldn’t have failed
D.
worked/wouldn’t fail
【简答题】As you worked late yesterday, you ______ have come this morning. A. needn’t B. mayn’t C. can’t D. mustn’t
【简答题】It is necessary for you to have worked in this sector before.
【单选题】—Have you worked here since you graduated? —No, I ____________at a factory in Beijing for six years.
A.
would work
B.
have worked
C.
had worked
D.
worked
【单选题】He tried to join the army but ___ because of poor health.
A.
turned down
B.
was turned down
C.
turned out
D.
was turned off
【简答题】He tried to join the army but was __________ because of poor health．
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