It was so noisy in the dining room that only by shouting to make himself heard.A. he has

问题补充：

It was so noisy in the dining room that only by shouting to make himself heard.

A. he has been able

B. has he been able

C. was he able

D. he was able

答案：

A. he has been able

B. has he been able

(答案→)C. was he able

D. he was able

解析：餐厅里是那么吵以至于只通过喊他不能使自己被听见。Only+状语句子采取部分倒装，叙述过去应为过去时，因此选C。