25. When _______________ comes to saving energy, big changes start with small steps, like turning off the lights.?

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

27. —Haven’t I told you that I like the beef well-done?

—Yes, but I _______ it longer than I usually do.

was cooking                B. cooked                   C. had cooked             D. will cook

16．－Governments at all levels have to take measures to improve the quality of basic education.

       －Exactly. _________, students' homework must be greatly reduced.

       A．That's to say            B．What's more            C．Believe it or not      D．In a word

What ___ the book I put here yesterday?

A. became of   B. has become of   C. became about   D. has become about

Scarcely was George Washington in his teens _____ his father died.

A. than              B. as                 C. while              D. when

Although it's raining, _____ are still working in the field.

A. they            B. but they          C. and they                D. so they

   I’ll start early , _______I oversleep.

A. unless             B. though            C. if         D. whether

 _______, I am sure that he is honest.

A.No matter people say                       B.What people say

C.Whatever people say                        D.It doesn’t matter people say

 The secretary made a note of it _______ she should forget.

A. in order that      B. in case         C. So that     D. ever when

Carol said the work would be done by October, ＿＿＿＿＿personally I doubt very much.　

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