Do you know the boyis sitting next tu Peter?–Yes, he is Peter’s friend.They are celebrating hisbirthday.
My brother is honest boy, he never tells a lie.
Rita, your Chinese is very good._____ have you been in China? —Since I was five. [ ]
I will never forget that terrible accident ________ it happened so long ago.[ ]
How about the pollution in the countryside?—Luckily, it’s not as serious as _______ in the big cities.