A: I am sorry but there is something wrong with the telephone.
B. I am sorry but the telephone is __________.
A: By the way, have you finished reading the novel?
B: By the way, have you __________ the novel?
A: When you are in trouble, you can phone me.
B: When you are in trouble, you can __________ me __________.
A: He set out to learn English by himself when he was eight years old.
B: He __________ learning English by himself when he was eight years old.
A: Although you worked in the big city, you should visit your parents once in a while.
B: Although you worked in the big city, you should visit your parents __________.
A: Before I could explain the reason why I was absent, he ended the call.
B: Before I could explain the reason why I was absent, he __________.