第一題選擇C!pretend to do sth 假裝做某事petend to be studying 假裝正在學(xué)習(xí),從when his mother stepped into his room可以判斷出要用進(jìn)行時(shí)態(tài)be doing第二題,可以改,多數(shù)情況下定語從句里面可以用which就可以用t...第一題為什么不用主動(dòng)形式pretend to do sth?petend to be studying 假裝正在學(xué)習(xí)，從when his mother stepped into his room可以判斷出要用進(jìn)行時(shí)態(tài)be doing此題我們期末考原題，當(dāng)時(shí)答案就是to be doing............................................就像我問你為什么音響會(huì)發(fā)聲，你就說因?yàn)橐繇憰?huì)發(fā)聲不是說了嗎，pretend后兩種用法，都是主動(dòng)，只要是pretend to do就是主動(dòng)但是按照句意寫的是當(dāng)。。。時(shí)候，因此用petend to be studying 假裝正在學(xué)習(xí)。