问题
选择题
Some students from Grade 9 ____ do some ____ for the old.
A.volunteered to; clean
B.volunteered; cleaning
C.volunteered to; cleaning
D.volunteered; clean
答案
答案:C
Some students from Grade 9 ____ do some ____ for the old.
A.volunteered to; clean
B.volunteered; cleaning
C.volunteered to; cleaning
D.volunteered; clean
答案:C