题目内容
4．________ you know Peter？（ ）| A． | Are | B． | Do | C． | Does | D． | Is |
分析 你认识Peter吗？
解答 答案：B．
考查助动词．句意你认识Peter吗，这里是一般疑问句，含有实义动词know，主语是you复数，因此用助动词do．故选B．
点评 考查助动词，要根据时态，人称，结合语境选择不同助动词的用法．
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16．Lab work is fun but you must be careful．Listen carefully when your teacher reads and explains the rules before your first lab lesson．
31．You must know the LAB RULESA the first lab lessons．
A．before
B．since
C．during
D．after
32．It is necessary for you toA before every experiment．
A．read all instructions carefully
B．take enough food and drinks
C．smell chemicals immediately
D．talk with your classmates．
33．If you are not sure of how to use any apparatus，C．
A．read the rules carefully
B．try them again and again
C．ask your teacher for help
D．return all apparatus to the places where they were
34．The underlined word"spill"meansD．
A．照射
B．伤害
C．摔下
D．溅出
35．When you are in the science lab，you mustn'tC．
A．be careful in order to prevent injury
B．listen carefully when your teacher explains the rules
C．taste chemicals without the teacher's permission
D．throw waste materials into proper waste baskets．
| LAB RULES | |
| Throughout the lessons | *Do not enter the science lab without the teacher's permission（允许）． *No food or drinks are to be allowed in the science lab． |
| Before the Experiment | *Read all instructions carefully before every experiment（实验）． *Prepare all apparatus（仪器）and put them in right places so that you will not knock them over while doing the experiment． |
| During the Experiment | *If you are unsure of how to use any apparatus or how to operate，ask your teacher for help． *Never smell or taste chemicals unless your teacher gives permission． |
| After the Experiment | *Wash all apparatus after use and return them to the places where they were． *Throw waste materials into proper waste baskets． |
| First Aid | *Report all accidents to your teacher immediately． *If you spill any chemicals onto your body or clothing，wash with plenty of water and report to your teacher． |
A．before
B．since
C．during
D．after
32．It is necessary for you toA before every experiment．
A．read all instructions carefully
B．take enough food and drinks
C．smell chemicals immediately
D．talk with your classmates．
33．If you are not sure of how to use any apparatus，C．
A．read the rules carefully
B．try them again and again
C．ask your teacher for help
D．return all apparatus to the places where they were
34．The underlined word"spill"meansD．
A．照射
B．伤害
C．摔下
D．溅出
35．When you are in the science lab，you mustn'tC．
A．be careful in order to prevent injury
B．listen carefully when your teacher explains the rules
C．taste chemicals without the teacher's permission
D．throw waste materials into proper waste baskets．