Tommy, you can never let others know what I have told you today.—Don’t worry. I will keep the .

Professor Wang _______to give us a talk nextweek.――Really That is good news .

–Why has Tom looked unhappy recently? –He has some difficulty ______ with his new classmates at school.

I prefer ____ to ____.

elen saw his tutor nod ________ to her, shecalmed down and went on with her performance