Last night, a millionaire had his house _____. As a result, a valuable diamond ring _____. [ ]

A. broken; robbed

B. broken into; was robbed

C. broken into; was stolen

D. break into; steal

关于三七灰土或二八灰土正确的选项是（）

A.是由粉状石灰与粘土加适量水拌合夯实而成的。

B.石灰与粘土的体积比为3：7或2：8

C.石灰与粘土的重量比为3：7或2：8

D.灰土每层均虚铺220mm，夯实后厚度为150mm左右