The river smells terrible. People must_____ dirty things into it.
A. be prevented to throw B. prevent from throwing
C. prevent to throw D. be prevented from throwing
—Do you like doing sports , Joe?
—Of course. We can’t keep healthy_____ taking enough exercise.
A. without B. by C. for D. With
In China , people are supposed to ______ instead of_____.
A. shaking hands; bow B. shaking hands; bowing
C. shake hands; bow D. shake hands; bowing
— How does Jack usually go to school?
— He _____ ride a bike, but now he ______ there to lose weight.
A. used to; is used to walk B. was used to; is used to walking
C. was used to; is used to walk D. used to; is used to walking
—Shall I take you home after school?
— No, thanks. Father will_____ on his way home.
A. wake me up B. pick me up C. let me down D. help me out
—Would you mind staying in such a noisy room?
— No, but my son needs a______ place to study in.
A. cleaner B. quieter C. safer D. Smaller
