He made up his mind to devote his life _____ pollution ______ happily.
Tan Dun won an Oscar ________ his music __________ the film Crouching Tiger, Hidden Dragon.
We will visit Shanghai this Sunday __________ it rains or it’s too cold.
---Why didn’t Jane go to John’s party? ---Because she ________.
---How was your trip?---The ______trip was so ________ that we felt very tired.
Look! There _______ a number of students running on the playground. The number of them _________ 15.