Question

8. On stepping into his room he was astonished to find the floor covered with          . (ant)

一走进他的房间，他惊讶地发现地板上都是看起来像小蚂蚁似的东西。

Answer 1

8. what looked like little ants介词with后是宾语从句，从句中无主语，因此，应用what引导， what在从句中充当主语，不可用that。