While our manager is away on business our company will be Mr Zhang.A. in the charge ofB.

问题补充：

While our manager is away on business, our company will be Mr Zhang.

A. in the charge of

B. in charge of

C. taken charge of

D. taking the charge of

答案：

(答案→)A. in the charge of

B. in charge of

C. taken charge of

D. taking the charge of

解析：考察charge用法。A由…负责（介词）；B负责…（介词）；C负责（动词）；句意：当经理外出出差的时候，我们的公司将由张先生负责。本句中横线前面已经有了be动词，说明这里应该使用介词短语构成谓语部分。故A正确。