Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
Now children, turn to page ________ and look at the _______ picture in Lesson Two.
Both of the two rulers are broken. I want to buy a _______ one.
December is the __________ month in year.
--- What is the date today?--- It's _________.
She knows a lot about China as she has been to China ________.