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20、Thinking that her daughter was doing homework, the mother left the room, _____

A．quickly and gentle                                  B．quick and gentle．

C．quickly and gently                               D．quick and gently

19、By working slowly but surely towards your goal, you'll ____ succeed．

A．eventually        B．a(chǎn)ccidentally          C．occasionally         D．purposely

18、—May I tell this to my close friend?

—No, you           . Never let anybody else know about it．

A．needn't           B．shouldn't            C．mustn't            D．can't

17、—Did Jack come back early last night?

—Yes, It was not yet eight o'clock _____ he arrived home．

A．when            B．that          C．before          D．until

16、— May I help you?

—Yes, I'd like to try on some sports jackets just like _____ I'm wearing．

A．it            B．one            C．the one          D．that

15、—Where is your uncle's home?

—In New York．But he _____ in Boston for four years．

A．has lived            B．lived          C．had lived           D．had been living

14、So far, several cases of a disease, _____ as H1N1, are reported to have been found in the country．

A．knowing       B．to be known         C．having known         D．known

13、Mike had to walk home ______ his bike stolen．

A．with          B．a(chǎn)s          C．for        D．since

12、—John, where are the cookies? Don't tell me you ate them all．

—_____. I couldn't help it．They were so good．

A．Yes．I did                    B．No, I didn't

C．Yes, I have                            D．Why? Sound strange

11、—I am afraid the task is too difficult for me, sir．

—_____, Linda．Just believe in yourself!

A．No problem                   B．That's all right

C．That's OK                               D．Come on