根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。（每空一词）
小题1:Food has been a serious problem in China in recent years such as fake milk powder（劣质奶粉）, Toxic Capsules（问题胶囊）. (safe)
小题2:These comic books ________ (it) are more or less worth reading.
小题3:----Is London the first European city the Olympic Games?
----No, it has been held in many other places in Europe. (hold)
小题4:More than one person ________(clean) the classroom at 6 o’clock yesterday.
小题5:It’s said that the price of food in China _____ ( rise ) quickly recently.
小题6:The fish is_____ ( terrible) bad, why not throw it away?
小题7:The famous writer always spends as much time as he can to his fans’ e-mails. (reply)
小题8:The suspect ___________(see) running along the street at that time.
小题9:_______ ( take ) more exercise and you’ll become healthier.
小题10:Though the hike is far ___________ ( tough), I’ll try to finish it.