They can’t go ______ because the meeting is beginning.

I’m not sure if he to my family at tonight’s party.

Now China is fighting against illegal cooking oil（地沟油）, a kind of waste oil _____can cause a lot of illness.

Which of the caps will you take?—I’ll take _______,one for my father ,the other for my brother.

More and more trees were cut down. _____, many animals are dying out. [ ]