Whydon’tyoucalldirectoryenquiriesandaskthem?It
来源:国语帮 3.31W
问题详情:
Why don’t you call directory enquiries and ask them? It ________ a new number if it’s not in the book.
A. can be B. could be C. must have been D. must be
【回答】
D知识点:虚拟语气与情态动词
题型:选择题