问题
选择题
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
答案：C
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。
