1.He pretended __________ when his mother stepped into his room.A.to study B.studying C.to be studying D.to have studied★为什么不选A而选C?2.The old house,where I lived about five years ago and that I visited,had a garden.★that I visited能改成which I visited吗?3.Guilin is a city that has a history of 2000 years.★that能改成which吗?
问题描述：
1.He pretended __________ when his mother stepped into his room.
A.to study B.studying C.to be studying D.to have studied
★为什么不选A而选C?
2.The old house,where I lived about five years ago and that I visited,had a garden.
★that I visited能改成which I visited吗?
3.Guilin is a city that has a history of 2000 years.
★that能改成which吗?
答