单选题 Athletes who train for a long period of time often ______ their diets with sports drinks.(U2,P39)

单选题 Even if an idea is really well thought through and creative, it's not always easy to make it ______ successful. (U2,P39)

单选题 As with all diseases, certain groups of people will be more ______ than others. (U5, P133)

单选题 What hobby are you ______ and spend lots of time on?(U4,P103)

单选题 I didn't ______ upset you, but you still didn't answer my question.(U5,P133)

单选题 Food in Sichuan, Chongqing, etc. tends to be ______ than food in many other places of the country.(U4,P103)

单选题 China has ______ different cultural and historical sites.(U5,P133)

单选题 The ______ of a species means that it is gone forever and can never be revived.(U5,P146)

单选题 Globally, a handful of widely spoken languages have ______ over other smaller languages. (U5,P146)