问题

It was getting dark, but the little boy didn’tknow______________.
A: who can he ask for help
B: what was wrong with the bike
C:where can he go to mend the bike
D: if he could arrive home on time or not
B: what was wrong with the bike
C:where can he go to mend the bike
D: if he could arrive home on time or not
正确答案是: