The Oscar Award is ______ all outstanding actors and actresses ______.

Water, which seems to be so simple and common, is ______ makes life possible.

________ made the school proud was ________ more than 90% of the students had been admitted to key universities.

 ______ he can hardly read is ____________ he is slow in mind.

---I’ll ask the teacher about past tense. I’m very puzzled about it. --- That is just _____ most of our classmates have doubt.