1.He pretended __________ when his mother stepped into his room.
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?
第一题选择C!pretend to do sth 假装做某事petend to be studying 假装正在学习,从when his mother stepped into his room可以判断出要用进行时态be doing第二题,可以改,多数情况下定语从句里面可以用which就可以用t...第一题为什么不用主动形式pretend to do sth?petend to be studying 假装正在学习，从when his mother stepped into his room可以判断出要用进行时态be doing此题我们期末考原题，当时答案就是to be doing............................................就像我问你为什么音响会发声，你就说因为音响会发声不是说了吗，pretend后两种用法，都是主动，只要是pretend to do就是主动但是按照句意写的是当。。。时候，因此用petend to be studying 假装正在学习。