It is generally considered that…一般认为
It is well known that…大家都知道
It must be admitted that…必须承认
对一般现在时的考查
①As you can see, the number of cars on our roads rising these days.
A. was keeping B. keep C. keeps D. were keeping
【解析】答案为C。为一般现在时表示经常的、习惯性的动作或存在的状态；也表示说话
者的态度、能力或自然现象等等。根据as you can see这个从句中用的一般现在时，
可判断出主句要用现在时态，keep doing表示“一直在做某事”。主语是the number
of cars谓语动词用单数形式。
②The father as well as children every Sunday afternoon in winter.
A. is going B. go C. goes D. are going
【解析】答案为C。这个句子的主语是the father所以其谓语动词要用单数形式。再根据
时间状语every Sunday afternoon in winter可判断出要用一般现在时，表示经常
性的动作。as well as his children在句子中作状语。
③This machine _______. It hasn’t worked for years.
A. didn’t work B. wasn’t working C. doesn’t work D. isn’t working
【解析】答案为C。“这台机器不工作（坏了）”，表示现在的一个状态，用一般现在时。
④Months ago we sailed ten thousand miles across this open sea, which ___ the Pacific, and we
met no storms.
A. was called B. is called C. had been called D. has been called
【解析】答案为B。本题的干扰源为上下文的过去时，但“被称为太平洋”是客观现状，只
能用一般现在时。
⑤Look at the timetable. Hurry up! Flight 4026 __off at 18:20.
A. takes B. took
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C. will be taken D. has taken