We cannot form. a sound opinion without facts, for we need to have factual knowledge______

根据下面材料，回答题。 What Should We Do before We Have a TestBefore a big exam, a sound

We cannot【 exist】 without air food or water.A. ex

We cannot 【go on】 quarrelling like this.A. choose

We cannot 【go on 】quarrelling like this.A. choose

According to the author it is always advisable to______.A.have opinions which cannot be r

We cannot form. a sound opinion without facts for we need to have factual knowledge______