--I haven't heard from Li Jun for a long time．

--What do you think _______ to him?

A．was happening                                 B．to happen

C．had happened                                     D．has happened

1、D

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--I haven't heard from Li Jun for a long time．

--What do you think _______ to him?

A．was happening                                 B．to happen

C．had happened                                     D．has happened

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