Every day, too much water in our school. We should save it.
I have to work hard _____ the test.
Please send ______ my best wishes when you go to visit your grandparents.
How many________ do you need to finish this article?
Walk _______ the bridge and then turn left ______ the right at the first turning .
--What’s this in the blue box? --________is an orange bottle. _______ orange bottle is mine .