1.we hoped that they this problem a)will solve b)solve c)is solving d)would solve 2. we hope that they this problem a)will solve b)solve c)is solving d)would solve 3) they say that the ozone layer gradually a)is destr b)destruct c)was destructing d)destructed 4 they say that the ozone layer by people's actvies a)is destructing b)destruct c)was destructing d)destructed
2. We hope that they ... this problem. A) will solve
3) They say that the ozone layer A) is destructing gradually
4 They say that the ozone layer ..A) is destructed . by people's actvies