制定学习计划时，应当（     ）

下列句子中有语病的一项是（    ）

    It was a lovely spring afternoon. My classmates and I were playing happily on the playground when I let out, “Ow! Ow! Something in my shoe is biting me.”

    Everyone was shocked by the cry. They took me into a classroom and were about to take off my 1. “Which foot is it?” one asked. “Let us have a look.”

    Suddenly, I remembered the holes in 2 socks. My family was very poor during those years. I wore welfare socks, which cost only a little, but those 3 welfare socks didn't last long. They soon had 4 at the bottom.

    I refused to take off my shoes. I 5 stand others seeing the holes in my sock. I tried to hold back my tears. Yet, each time the thing 6 my shoe bit me, tears raced down my face.

    My teacher, Miss Diane, hurried into the 7. “What's wrong?” she asked.

    “Something is biting her right foot, 8 she doesn't let us take off her shoe.” one of my classmates answered.

    Miss Diane lived next door to me. She 9 everything about my family. She put both hands on my shaking shoulders and 10 into my painful and hopeless eyes.

    “Oh, yes, it must be a sock-eating ant,” she said, as if she had 11 seen the thing inside the shoe. “I had a bite from one of those ants. By the time I got my shoe off, it had 12 almost the whole bottom off my sock.” My classmates nodded while they were listening to the teacher 13, although they all looked a little puzzled.

    Miss Diane took off my right shoe and sock and shook them over the dustbin. Two red ants14it.

    “Just what I thought. The ants have eaten part of her sock.” When she stroked an alcohol cotton ball on the bites, she added,” You are such a 15 girl to take so many bites.”

    The alcohol felt cool on the bites and a little girl's pride was saved by the “sock-eating ant” story.

（Ⅰ）由折线图可以看出，可用线性回归模型拟合月度市场占有率y与月份代码x之间的关系．求y关于x的线性回归方程，并预测M公司2017年4月份的市场占有率；

（Ⅱ）为进一步扩大市场，公司拟再采购一批单车．现有采购成本分别为1000元/辆和1200元/辆的A、B两款车型可供选择，按规定每辆单车最多使用4年，但由于多种原因（如骑行频率等）会导致车辆报废年限各不相同．考虑到公司运营的经济效益，该公司决定先对两款车型的单车各100辆进行科学模拟测试，得到两款单车使用寿命频数表如下：

经测算，平均每辆单车每年可以带来收入500元．不考虑除采购成本之外的其他成本，假设每辆单车的使用寿命都是整数年，且以频率作为每辆单车使用寿命的概率．如果你是M公司的负责人，以每辆单车产生利润的期望值为决策依据，你会选择采购哪款车型？

参考数据：， ${\displaystyle \sum }_{i=1}^6\left(x_i-\overline{x}\right)\left(y_i-\overline{y}\right)=35$ ， ${\displaystyle \sum }_{i=1}^6{\left(x_i-\overline{x}\right)}^2$ =17.5．

参考公式：

回归直线方程为 $\hat{y}=\hat{b}x+\hat{a}$ 其中 $\widehat{b}$ = $\frac{{{\displaystyle \sum }}_{i=1}^n\left(x_i-\overline{x}\right)\left(y_i-\overline{y}\right)}{{{\displaystyle \sum }}_{i=1}^n{(x_i-\overline{x})}^2}$ ， $\widehat{a}$ = $\widehat{y}$ ﹣ $\widehat{b}\overline{t}$ ．