28、---How’s your tour around the North Lake? Is it beautiful?

---It ________ be, but it is now heavily polluted.

A. will            B. would               C. should                      D. must

27、I like _______ in the autumn when the weather is clear and bright.

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

25、The children went home from the grammar school, their lessons ____ for the day.

A． finishing      B． finished     C． had finished         D． were finished

24、The book was written in 1946, ____ the education system has witnessed great changes.

A．when        B． during which        C． since when         D． since then

23、Science and technology have ____ in important ways to the improvement of agricultural production.

A． connected          B． assisted     C． contributed         D． witnessed

22、—Do you like your new job as a saleswoman?

—Very much. But I am tired ____ standing all day.

A． of              B． with           C． by             D． about

21、---If the traffic hadn’t been so heavy, I could have been back by 6 o’clock.

--- ____ Tina was here to see you.

A．Forget it.              B． What a pity! 

C． Is that so?           D． I’ll do what I can to help you.

20、____ he come ten minutes earlier, he ____ catch the bus.

A．If; may      B． May; might         C． Should; would      D． Would; should

19、---Will you be sent abroad for further studies?

--- I have ____!

A． such no luck        B． no such luck        C． no such a luck      D． not such a luck