【题目】The number of the graduates choosing to work and live in big cities has declined, one third of ________ we expected.
A. what B. which C. whom D. that
在线课程【答案】A
【解析】
考查宾语从句。句意：选择在大城市工作和生活的毕业生人数减少了，是我们预期的三分之一。此处是介词of后的宾语从句，指我们期望的数值，用what引导。what在宾语从句中作动词expected的宾语，故选A.