英语that指代问题1.The problem of pollution in this city is more se
英语that指代问题 1.The problem of pollution in this city is more serious than ___ in other cities. A.that B.it C.this D.those 2.It is much more sandy in Beijing than ___ in spring and early summer. A.in Tianjin B.that in Tianjin C.Tianjin D.it in Tianjin 答案都是A,为什么第二题不能选B