【问】 ——Do you think it's going to rain over the weekend?

—— _______ .

A.I don't believe B. I don't believe it

C.I believe not so D. I believe not(全国高考英语试题，1994)

答案为D(I believe not)。它与I don't believe so.有无区别?

【答】 见suppose not，hope not。