Question

【题目】The clay pieces are fired ________ a very high heat after they are dried.

A. on B. in C. to D. at

Answer 1

【答案】D

【解析】

句意：粘土块干燥后，在高温下烧制。A. on在……上；B. in在……里；C. to到；D. at在，以……速度（温度）。at a high heat在高温下，故答案为D。