ys, scientists are working hard tofind a best way of treating addictions __________ drugs

The environment will be further polluted unless some measures _____

We can no longer ____to consider water an almost free resource that we can use as much as we like.

You look pale Did you sleep well— No It was already midnight ____ I finished myhomework

are some health problems that, when ____in time,can become bigger ones later on.