Question

【題目】根據(jù)短文內(nèi)容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。

Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided. 【1】

Write it out

You can also check a math problem by writing everything out on paper. 【2】 Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.

【3】

Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (減法)—to determine whether or not your answer is the correct one.

Plugging in

You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (變量). 【4】 This is the only real way to assure yourself that the answer you’ve found is correct.

Check for a reasonable answer

【5】 For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.

A. Do the opposite

B. Correct the answers

C. Plug the variable in the equation (方程) to check it out.

D. Therefore you’ll improve your grades, as well as your math skills.

E. It also helps you to figure out everything after you have already finished the test.

F. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.

G. This helps you to know what information you have and what information you need to solve.

Answer 1

【答案】

【1】D

【2】G

【3】A

【4】C

【5】F

【解析】試題分析：本文為說明文。該文就如何解數(shù)學(xué)題及怎樣驗證答案進行了詳述

【1】D考查考生對上下文因果關(guān)系的理解能力及段落主旨的概括能力。根據(jù)上句“Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided.”可知，此處應(yīng)是知道了如何解題及驗證答案有助于提高你的成績和解題技巧。故選D

【2】G考查考生對上下文順承關(guān)系的理解能力。根據(jù)上文“You can also check a math problem by writing everything out on paper.”及學(xué)生解數(shù)學(xué)題的常識性經(jīng)驗可知“把所有的已知條件都列出后，你就會知道該如何解題”。故選G

【3】A考查考生對標題的提煉能力。從后面的句子：Make sure your answers work by doing the opposite procedure of what your problem calls for, 說明我們可以反過來做題目，可知A項與其吻合

【4】C考查考生對上下文順承關(guān)系的理解能力。從前面的句子：You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (變量). 可知是在方程式中帶入變量來檢查，該段主題Plug in和該段中的variable一詞可知C為正確選項。

【5】F考查考生對段落主題句的概括理解能力。從后面的舉例：For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point.可知如果結(jié)果沒有意義，說明答案有誤，該段主題“檢查答案的合理性”，和F項中的“make sense”意思一致。