I.Make questions for the following sentences based on the underlined words :
1. She is unhappy because her grades in Maths are so bad
=>Why is she unhappy?
2. My sister looked tired because she had too many exercises to do
=>Why did your sister look tired?
3. We mustn't let the children play in the kitchen because it is sometimes a dangerous place
=>Why must we not let children play in the kitchen?
4. She didn't feel well because she ate too much meat
=>Why did she not feel well?
5. I can't buy those books because I don't have enough money
=>Why can't you buy those books?
6. They were wet because it rained heavily
=>Why were they wet?
7. My sister stayed at home yesterday because she felt sick
=>Why did your sister stay at home yesterday?
8. I did not travel by train because the weather was so bad
=>Why didn't you travel by train?
9. The man had to leave the office immediately because he didn't feel well
.=>Why did the man have to leave the office immediately
10. They wear warm clothes because it is cold
=>Why do they wear warm clothes