Put the question for the underline parts in following sentences, using question words in brackets

Ex5. Put the question for the underline parts in following sentences, using question words in brackets.
1. Nam usually goes to school by bus. Sometimes, he rides his bicycle. (How)
2. My grandfather used to go fishing in the West Lake every afternoon. (What)
3. There are a lot of trucks and cars on the highway in the rush hour. (Where)
4. The students used to be taught about road signs when they studied in secondary school. (What)
5. Hung always drives his car very carefully. (How)
6. It is about 100 km from Ha Noi to Hai Phong. (How long)