While standing on a moving bus, you’re supposed to hold onto the bar in order not to _____.
A．in balanceB．keep balanceC．lose balanceD．hold the balance
C
題意為：站在正開動(dòng)的公車上，為了不失去平衡你應(yīng)拉住扶手。Lose balance 失去平衡。
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