Things made of plastic are usually _______, but they are _______ to get polluted.

______ I do the laundry first?-No,you _____. You can do your homework first.

What kind of volunteer work would you like to do? —I’d like tosick kids in hospital.

I can________ be a nurse．I’m not a very patient person at all．

If nobody breaks traffic rules and everyone is careful enough, most accidents can be .