有几道英语题，高手指教。

第一题：b 是对的
第二题：when and where
第三题：间接引语中，如果引述动词（上述的asked）是一般过去时的时候，引号中句子的时态要平移到过去，像上述例句中，引号中是一般过去时，平移到过去应该变成过去完成时，而且引语中的人称如果是第二人称，则变成与主句中的宾语保持一致，综上所述，所以答案应该是whether(if也可) i had often riden a bike from place to place when i had been at school?
第四题：is the easiest among

b
when and where
whether i often rode i was
is the easiest among

1. When you are watching an interesting TV play, it is suddenly B by some ads and they are appearing on the screen.
A continued B stopped C attacked D performed

2. I was born in Torontoon December 25th,1938.(就in Torontoon December 25th,1938 部分提问）
Where and when you born?

3. Sam asked me,"Did you often ride a bike from place to place when you were at school?"(改为间接引语）
Sam asked me whether I rode a bike from place to place when I was at school.

4. Lesson Seven is more difficult than L6.
L5 is easier than L6(合并句子）
Lesson 5 is the easiest one among the three lesson.