It's impolite______ you to laugh at others

It's impolite______ you to laugh at others
It isn't n_______that a pupil should have a personal computer
Does Lin Tao read China D_____every day
A driver should get a driving l_____before he drivers on the road
At p_____,the international situation ia getting more and more complex
You should grasp every o_____to improve your Chinese
Some hobbies can get______(挡道) of our study
不好意思 写错了 最后一道有三个空