He cannot answer this question at once bu

She cannot answer this question at once， but can find the answer to it from that book.A.e

He said ________ as not within his power to answer the question. A. that B. this C. su

This question admits______several answers. （1992年考试真题）A．forB．withC．ofD．to

She cannot answer this question【 at once】 but can

He cannot answer this question 【at once】 but can

The answer this question is known ________ us all