both his father and mother ______ (have)chances of ____(be)doctors then.

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both his father and mother ______ (have)chances of ____(be)doctors then.
both his father and mother ______ (have)chances of ____(be)doctors then.

both his father and mother ______ (have)chances of ____(be)doctors then.
had
being

are 他的爸爸妈妈都是医生。 are