On some British streets, there ________
题型:选择题
问题:
On some British streets, there ________ be as many as five different garbage cans-that's confusing![ ]
A. can
B. have to
C. must
D. shall
On some British streets, there ________ be as many as five different garbage cans-that's confusing![ ]
A. can
B. have to
C. must
D. shall