30. If only I _______ more careful that day!

　 A．could be　　　　 B．would have been　 C．should be　　 D．had been

29.The children in the backseat might have been seriously injured if the driver _______ that they wear seatbelts．

　 A．hasn’t been insisting 　B．hadn’t insisted　 C．wouldn’t insist 　D．wasn’t insisting

28.Were she to leave right now，she _______ there on Sunday．

　 A．had got　　　　 B．might have got　 C．would get　　　　 D．has got

27. _______ for my illness，I would have lent him a

　helping hand．

　 A．Not being　 　　B．Had it not been　　 C．Without being　　　 D．Not having been

26.If I hadn’t stood under the ladder to catch you when you fell，you _______ now．

　 A．wouldn’t be smiling 　　　B．couldn’t have smiled

　 C．won’t smile　　　　　 　　D．didn’t smile

25.“You are very selfish．It’s high time you _______　 you are not the most important person in the world，” Edgar said to his boss angrily．

　 A．have realized　 　B．realized　 C．realize　　 　　D．should realize

24.I wish I _______ longer this morning，but I had to get　 up and come to class．

　 A．could have slept B．slept　 C．might have slept　 　D．have slept

23.If I _______ harder at school，I would be sitting in a comfortable office now．

　 A．had worked　 B．worked　 C．were to work　 　D．were working

22.If the whole operation _______ beforehand，a great

　 deal of time and money would have been lost．

　 A．was not planned 　　　　　B．has not been planned

　 C．had not been planned 　　　D．were not planned