Question

【题目】The other day, my brother drove his car down the street at _____ I thought was a dangerous speed.

A. as B. which

C. what D. that

Answer 1

【答案】C

【解析】

答案　C　[at后接宾语从句。当宾语从句中缺少主语、宾语或表语时，要用what引导，此句中what作宾语从句的主语。]