题目

We all know that the gravity on Mars is only about _________ of __________ on Earth.A. three-eighths; the one B. three-eighth; the oneC. three-eighths; that D. three-eighth; that 答案：【答案】C【解析】句意：我们都知道火星上的重力仅相当于地球上的八分之三。考查分数表达法，分数表达为子基母序，分子大于1，分母加S，因此八分之三的表达为three-eighths，由后面的空格可知此处代指的是重力一词gravity，英语中代指同类事物中的单数名词或不可数名词用that，故答案选C。—Has Tom come yet? —Not yet. Let's wait a few more minutes. He promised ______.A. come B. coming C. to come D. came