My mother is _____ .[ ]
I have a lot of problems ______ physics.[ ]
_________ my two sisters. And __________ my brother.
Many teenagers show interest in the books that are written ________ Guo Jingming.—That’s true. My son says he can get what he thinks and wants in his books.[ ]
The bus hit against a tree in the fog and __________to the deep valley, with ten passengers killed and twenty wounded.