Whenever you are _____ , you can ask us for help.
A. in ruins B. in reward C. in trouble D. in turn
Whenever you are _____ , you can ask us for help.
A. in ruins B. in reward C. in trouble D. in turn
C
介词短语。in trouble “处于困境”, in reward“作为报答”, in turn “依次，轮流”