After the war, a new school building was put up ( ) there had once been a theatre.
(A)that
(B)when
(C)which
(D)where
The old man asked Lucy to move to another chair ( ) he wanted to sit next to his wife.
(A)although
(B)unless
(C)because
(D)if
He says ( ) clearly that beginners understand most of his words.
(A)such
(B)so
(C)such a
(D)so a