【推荐1】It's essential________ (know) which is the best treatment for the burns.(所给词的适当形式填空)

【推荐2】_________( know) all this,   I still want to see it in person. (所给词的适当形式填空)

【推荐3】Tom often pretends _________ (know) everything, but actually he is ignorant. (所给词的适当形式填空)

【推荐1】A massive earthquake hit the city in the summer of last year, ______ (kill) at least 250 people.(所给词的适当形式填空)

【推荐3】As you know, the Spring Festival is celebrated by Chinese all over the world, ________ (make) it one of the most popular festivals. (所给词的适当形式填空)

【推荐1】The robot is powered by a battery on its back, which can keep it________(operate)for an hour. （所给词的适当形式填空）

【推荐2】单句语法填空
1. I _____________(look) at the photos on the noticeboard when I heard a voice behind me.
2. _____________(turn) around, I saw an older man.
3. When my English teacher _____________(step) into the classroom, I was surprised to see the same older man I _____________(meet) earlier．
4. Everyone started laughing, and I looked at them _____________ panic．
5. _____________ I was embarrassed，his words made me a lot _____________(relax)!

【推荐3】Rock concerts ________（feature）loud music have become a major part of American youth culture. (所给词的适当形式填空)