Be careful! You might fall into the water.–Thank you. I____.I______ so close to the pool.

What do we need for the dumplings? —______ and some vegetables. [ ]

.Many scientists believe that now we can study the behavior of a three-year-old child to see ____ they will grow up to be criminals.

The monkeys are running and jumping ______. [ ]

Now the air in our city is _______ than it used to be. Something must be done to stop it.