题目内容
9．The bell rang ______ the teacher was explaining the problem to the students..（ ）| A． | after | B． | while | C． | before |
分析 当老师在向同学们解释难题的时候，铃声响了．
解答 答案：B；
根据设空处的句子用了过去进行时，可以推断本句的句意是"当老师在向同学们解释难题的时候，铃声响了．"，表示主句的动作发生在在从句动作持续进行的过程中，所以用while引导该时间状语从句，while"当…时"，通常与延续性动词连用，且用于进行时中，故选B．
点评 本题主要考查连词的用法，连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词．连词的用法都比较多，语义之间还有交叉，熟记其基本应用规则，了解其区别，注意固定搭配对象，是做好此类题型的关键．
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20．It's getting hotter and hotter．So do you want to eat something cool？Maybe you will like the following foods．Learn to make them，and this summer will be more delicious!
16．If you want to make a watermelon ice-cream，how much sugar do you need？B．
A.1/2spoon
B.1spoon
C.1/3spoon
17．If you want to make a banana pudding，how many eggs do you need？C
A.4
B.2
C.3
18．When you make a banana pudding，how long do you need to put it in the fridge？A
A．At least one hour
B．About 10minutes
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19．What do you NOT need if you want to make a watermelon ice-cream？C
A．knife
B．blender
C．plate
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A．It's more delicious to eat the banana pudding with cream．
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C．We put the watermelon mixture in the ice-cream maker first，then in the fridge．
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A.1/2spoon
B.1spoon
C.1/3spoon
17．If you want to make a banana pudding，how many eggs do you need？C
A.4
B.2
C.3
18．When you make a banana pudding，how long do you need to put it in the fridge？A
A．At least one hour
B．About 10minutes
C．One day
19．What do you NOT need if you want to make a watermelon ice-cream？C
A．knife
B．blender
C．plate
20．Which of the following is TRUE according to the passage？A
A．It's more delicious to eat the banana pudding with cream．
B．We should pour milk over the bananas．
C．We put the watermelon mixture in the ice-cream maker first，then in the fridge．