一、both, all
twins __go to school by bus.
parents are __fine. don’t worry about their john and i are __good friends.4.
__the books in the shop are sold out.【答案】1. both2.
both3. all4. all
点拨】both和all都是“全部，所有”之意。both用于表示“两者都”，all用于表示“三者（或以上）都”。二、much too，too much，too many
1. we h**ehomework to do on weekends.2.
i can’t wear the new clothes. it is __small.3.
he was ill because he ate __food yesterday.
mall.答案】1. too much2. much too3. too much4. too many
点拨】too much和too many均有“太多的”之意。其中前者修饰不可数名词，后者修饰可数名词的复数形式。much too是副词，用于修饰形容词或其它副词。
根据其修饰的对象的词性就可以做出正确选择。三、asleep，sleep，sleepy
1. i stayed up too late yesterday. i feel verynow.
2. the man couldn’t fallbecause of the loud noise.3.
the movie was boring. so he went to __early.
4. the boy was __in the classroom when the teacher came.【答案】1. sleepy2. sleeping/asleep
点拨】asleep和sleepy都是形容词，但asleep的意思是“熟睡的，睡着的”，sleepy的意思是“有睡意的，想睡觉的”。sleep则是动词“睡觉”。be asleep和be sleeping可以替换，表示处于熟睡状态。
四、turn off，turn down，turn on，turn up
1. i want to watch the football game. please __the tv.
2. your radio is too noisy. please __it
3. students mustthe light when they le**e their classroom.4.
please __the radio. i can’t hear it clearly.【答案】 on2.
turn off4. turn up
点拨】turn off“关闭（灯，电视等各类电器）turn on“打开（灯，电视等各类电器）”turn down将音量“关小”，turn up将音量“开大”。
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