The manager or his assistant ______ planning to go.

The manager or his assistant ______ planning to go.
A、were
B、are
C、was
D、be
【正确答案】：C
【题目解析】：主语使用or连接的，表示二者只能选其一，谓语应与就近的主语一致，be不能直接作谓语，排除，his assistant 为单数，AB排除。