What do you think of genetically modified food (转基因食品) —We all think ______ is careless ______ some scientists to say it is safe before doing any experiment.

We love our capital Beijing, one of ______cities in the world.——So do I .

tty Shall we go swimming this Sunday–This Sunday I am sorry, I have a lot ofhomework ____ this Sunday

When we feel sad, some colours can _______.

I don’t like watching documentaries because they are boring. — ______________.