when chinese people fid out that someone comes from London,

问题描述:

when chinese people fid out that someone comes from London,
when chinese people fid out that someone comes from London,they often say,"London is a foggy city,isn't it?" British people who visit China often ________say that London is not a foggy city at all!
A.must B.have to C.should D.will
请说明选择的具体原因,以及如何排除其他的选项,

B
A必须
B不得不
C应该
D会
根据意思:中国人看到有人从伦敦来,经常会问:伦敦是个雾城,是不是?英国人就会不得不说:伦敦根本不是个雾城!
根据句意,英国人迫于中国人的疑问不得不澄清一样事实,所以用have to