Question

When asked to explain ________ made his lessons so exciting, the teacher kept silent. A．what..

When asked to explain ________ made his lessons so exciting, the teacher kept silent. A．what it was that B．that what it was C．what was it that D．that what was it

Answer 1

A

试题分析：句意：当被要求解释是什么让他的课使学生这么兴奋的时候，这个老师保持沉默。这句话中explain后面是宾语从句，宾语从句后缺成份，并且是做主语的物(做主语、宾语、表语，)，那要用what引导（如不缺成份用that），而且是强调句的特殊问句：is/was it…that…，那宾语从句中的疑问句要用陈述语序，因此是A。