1. (2018高二上·深圳期中) 阅读下面短文，从短文后各题所给四个选项（A、B、C 和 D）中，选出可以填入空白处的最佳选项。

    When I was a junior school student, I was a slightly bored male student who believed that doing any more than 1 was wasted effort. One day, this idea threw me into 2.

    In Mrs. Totten's math class, she3 assigned daily homework, and on the following day, our 4 were based on our oral answers to homework questions.

    Mrs. Totten usually walked up and down the rows of desks 5 answers from student after student in the 6the questions had appeared on our homework sheets. She would 7either at the front or the back of the classroom and work toward the other end.

    Since I was  8 near the middle of about 35 students, it was easy to9which questions I might have to answer. This particular time, I had completed my usual two or three problems according to my 10.

    What I11 to expect was that several students were 12, which threw off my estimate.13 Mrs. Totten made her way from the beginning of the class，I 14 tried to determine which math problem I would get. I tried to work it out before she got to me, but I had 15freeze and it couldn't even16.

    When Mrs. Totten 17 my desk，she asked what answer I'd got for problem No. 14. "I…I didn't get anything," I answered，and my face felt warm.

    "Correct," she said.

    It 18that the correct answer was zero.

    What did I learn that day? First,19 do all your homework. Second, in real life it isn't what you say but how you say it that 20.