根据课文内容填空（不需要标点，小写即可）1、Who was Jack? Jack was__________.(3个单词）2. When did Jack hit upon the idea of decorating the cab? Jack hit on the idea when_______________________________________.（12个单词）3. When did Jack begin to try out his idea? He tried out his idea ________________________________________.（8个单词）4. When did Jack put up reproductions of great paintings? He did so when ______________________________________________.（10个单词）5. What do people appreciate, according to Jack? According to Jack, people appreciate__________.(2个单词）6. What happened between the author and Jack? They became________________.(2个单词）

When do people open up?: When they are comfortable|When they are sick|When they are uncomfortable|When they feel powerful

When people opening up? A: When they feel powerful B: When they are sick C: When they are uncomfortable D: When they are comfortable

When will an offer become effective? A: when it is dispatched B: when it reaches the offeree C: when it is withdrawn D: when it is revoked

Can you tell _______?: when did it happen|when it happened|when it was happened|when was it happened

When are multimedia tools effective? A: When they are colorful. B: When they enhance your message. C: When they involve technology. D: When they are funny.

When did the author take part in the race? A: When she was a freshman. B: When she was a sophomore. C: When she was a junior. D: When she was a senior.

When can items of clothing be expensive? A: When they are from the supermarket. B: When they are taxed too much. C: When it is a well-known brand or design. D: When they are in the sale.

【单选题】______ the meeting is not decided yet. A. When hold B. When to hold C. When to be held D. When held

________ the airport they waved again and again to me. A: When left B: When leave C: When to leave D: When leaving