Question

Our playground is not so tidy and beautiful as before, students must ____ dirty things on it.  

A．be stopped to throw	B．be stopped throwing
C．stop to throw	D．stop from throwing

Answer 1

B

試題分析：句意：我們的操場不如以前干凈整潔，必須阻止學生亂丟雜物。Stop to do sth停下來去做某事；stop doing sth停止做某事；stop sb from doing sth阻止某人做某事。結合句意必須阻止學生亂丟雜物，而學生students作句子主語，故用被動語態。所以選B。