在职攻硕英语考试

【单选题】 All the firemen in the city were ______to fight against the big fire.
A．called in
B．called off
C．called up
D．called on

网考网参考答案：C
网考网解析：
[注释] called in意为“回收”；called off意为“取消”；called up 意为“召集，打电话，使人想起”；called on意为“访问(某人)”。 查看试题解析出处>>