While standing on a moving bus you’re supposed to hold onto the bar in order not to .A. i

问题补充：

While standing on a moving bus, you’re supposed to hold onto the bar in order not to .

A. in balance

B. keep balance

C. lose balance

D. hold the balance

答案：

A. in balance

B. keep balance

(答案→)C. lose balance

D. hold the balance

解析： 题意为：站在正开动的公车上，为了不失去平衡你应拉住扶手。Lose balance 失去平衡。