Read the following sentences and answer the question below

问题描述:

Read the following sentences and answer the question below
(1)Since this is your first visit to my family,shall I show you around our house?
(2) You'd better take a rest since you've got a bad headache.
(3) Since he doesn't know much about British culture,he has decided to make more friends with the local people.
(1)How many clauses does each sentence above have?
(2)Which clause tells us the reason?The clause with since or the main clause?
(3)Where can we put the clause with since?Before or after the main clause?

1.two,one,two
2.this is your first visit to my family; I show you around our house;since you've got a bad headache;he doesn't know much about British culture;he has decided to make more friends with the local people.
3.as you like.