Whilestandingonamovingbus,you’resupposedtoholdontotheba...

問題詳情：

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

【回答】

C

知識點：詞組 短語

題型：選擇題