The environment in our town isgetting worse and worse,so many trees____.

I wish my house would be built _____we can enjoy beautiful scenery with mountains and rivers

In many countries, some scientistsare already _______ research in order to produce a cloned human baby.

for a long time, but he tried his best to makeup for what he missed

Mom, could I watch TV now—Sorry, you can’t watch it____ you finish your homework.