1This is the song I’ve toldyou about. Isn’t it _____ beautiful one?

I might fail，but________I insist on doing it.I never lose heart.

There are some warnings in some countries ______ overexploitation of underground water has caused the decline of wetland andincrease of desertification

He wanted to pass the exam and styed up very late, this_____ creates further problems

He never reads anything ______ is not worth reading