56.The child is teaching himself English.

　 The child is ________ ________ _______ _______.

55.With these words, the tiger jumped into the water and no longer came out.

　 _______ the tiger _______ these words, he jumped into the water and didn’t _______ ________ ______.

54.A window of the classroom was broken by a strong wind.

　 ________ _________ the windows in the classroom _________ __________ the strong wind.

53.When I go back to school, I will not play computer games any longer.

　 I __________ ________ __________ play computer games when I ___________ _____________ school.

52.What Kate did worried her mother.

　 What Kate did __________ her mother ___________.

51.I don’t know how to use the computer.

　 I don’t know _______ I _______ _______ the computer.

50.I did it all by myself.

　 I did it __________ _________ help.

49.My aunt looked after me very well.

　 My aunt _________ ________ _________ _______ me.

48.The children had a wonderful time at the party yesterday.

　 The children ______ ______ at the party yesterday.

44.If we don’t do it now, we won’t finish it on time.

　 ______it now, _______ we won’t finish it on time.