Leaders of many countries have been trying to _____ what it is that makes China develop so fast．

       A．carry out       B．figure out         C．break out        D．watch out

 The computer system _____ suddenly while he was searching for information on the Internet．

       A．broke down                                     B．broke out         C．broke up         D．broke in

 —You’re always working．_____, let’s go shopping．

       —All you ever want to do is going shopping．

       A．Take your time                           B．Don’t worry

       C．Come on                                D．Take it easy

 —I’ve studied growing plants as one of my interests．Could I make some suggestions?

       —___________．

       A．You will make it                           B．Go right ahead

       C．Don’t mention it                           D．Take it easy

 His illness _____ his absence．

       A．showed          B．accounts for        C．explains         D．gives out

 You’ve been so kind to us that we will always be deeply _____．

       A．out of debt       B．in your debt      C．in trouble           D．in danger

 —Mr．Green was born in China．

       —It’s no _____ he can speak Chinese so well．

       A．matter            B．doubt           C．wonder           D．problem

 The meeting was to have started at nine o’clock, but the chairman had not _____ by ten．

       A．turned up        B．turned down      C．turned out      D．turned off

 We have planted thousands of trees in recent years．This year _____ we’ve planted ten thousand trees．

       A．even            B．just              C．alone          D．only

 It was an exciting moment for these football fans this year, _____ for the first time in years their team won the World Cup．

       A．that           B．while             C．which             D．when