Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
He cannot lend me the book now. He has not finished reading it yet.
A.Having finished reading the book, he cannot lend it to me.
B.He cannot lend me the book until he has finished reading it.
C.As long as he cannot finish reading the book, he will lend it to me.
D.Not having finished reading the book, he will lend it to me.