题目: 16.This is _____ the most difficult job I have ever tackled. A) by rights B) by itself C) by oneself D) by far 题目: 17.It was imperative that I _____ as close as possible. A) be B) will be C) was D) am 题目: 18.Everything was white and I remembered _____ all kinds of ladies dressed up in funny white things with all their hair covered with some sort of cloth. A) seeing B) see C) to see D) seen 题目: 19.Physics is _____ to the science which was called natural philosophy in history. A) alike B) equivalent C) likely D) uniform 题目: 20.People speak _____ him as the best known humorous writer of all times. A) to B) of C) with D) for