—Put these glasses away before they—OK．I'll put them in the cupboard．A. have brokenB. are

问题补充：

—Put these glasses away before they．

—OK．Ill put them in the cupboard．

A. have broken

B. are breaking

C. will be broken

D. get broken

答案：

A. have broken

B. are breaking

C. will be broken

(答案→)D. get broken

解析：句意：趁着这些玻璃杯还没有被打破将它们收好。Before引导的是时间状语从句，在时间状语从句中，用一般现在时代替一般将来时，而且glasses和break是被动含义，用一般现在时的被动语态。选D。