Trees and flowers ________every year to make our country more beautiful.

英语数字6,500,431,729读成____________.

Nobody cleans this street. This street is very ______.

Is there in today’s magazine?—Yes. Premier Wen Jiabao saw “stay-home children” May,25th.

The factory­­­­­­________ we visited yesterday was the one _______ I once worked.