This is a useful rule, ….difficult to remember.
A.so
B.but
C.and
D.or

The first two services are free, ….the third costs £35.00.
A.while
B.when
C.since
D.as

…. knowledge can be acquired from books, skills must be learned through practice.
A.Since
B.And
C.But
D.Whereas

She could not speak,….could she understand anything we said.
A.when
B.as
C.or
D.nor

She not only works hard…. has a good relationship with all her colleagues.
A.since
B.as
C.but also
D.so

Whether you win .... lose this race, it doesn’t matter as long as you do your best.
A.nor
B.but
C.or
D.and

We were sitting,.... I remember, in a riverside restaurant.
A.whereas
B.as
C.and
D.yet

We wanted to go to the beach;.... , it started to rain and we stayed at home.
A.however
B.moreover
C.yet
D.consequently

Forgive my asking, .... you’re not very happy, are you?
A.but
B.and
C.so
D.as

Wear your clothes .... you want.
A.but
B.so
C.and
D.as