5.My english friend finds driving on the right difficult.
→My english friend isn't used to driving on the right.
+ (be) used to N/V-ing =( be) accustomed to= (be) familiar with= (be) acquainted with ( quen, thích nghi với điều gì)
6.My father used to take me to the zoo when he had free time.
→I was used to being taken to the zoo when my father had free time.
7.The mechanic serviced my car last week.
→I had my car serviced last week by the mechanic.