Not only ________ polluted but also ________ crowded.
The book has been translated into thirty languages since it ______ on the market in 1973.
There are over 58,000 rocky objects in ______ space, about 900 of which could fall down onto ______ earth.
--- I’m sorry. I shouldn’t have blamed you for coming back later.--- ________. I know you were worried about me.
--- Since the end of last century, she has been trying to be a famous singer. Now she has realized her dream.--- As the saying goes, “_______”
The school ____ we visited last week is the one ____ the singer was born.