试用括号里动词的过去完成时态或一般过去时态来填充空格。
B. Fill in the blanks with the past perfect or simple past tense of the verbs in brackets.
我能归纳出一般过去时态的肯定句、否定句以及疑问句的基本句式结构。
I can find out the sentence structures of the positive, negative statements and questions forms of the simple past tense.
若按普通英语的动词时态规则，就得用一般过去时或现在完成时。
In this case, the past or present perfect tense should be used according to the grammatical rules of common English.
英文摘要时态的运用也以简练为佳，常用一般现在时、一般过去时，少用现在完成时、过去完成时，进行时态和其他复合时态基本不用。
The use of tenses in English also is better to concise, commonly used present tense, the past tense, use less when completed, the past is finished now, tense and other composite tense basic need not.
但事实上，要是我来选的话，我会选择a为正确答案，因为它是一般过去时的形式，与句中的bought、yesterday和didnt的时态保持一致。
Actually, I would have selected a as the correct answer because it is past tense in keeping with the sentence - "bought", "yesterday" and "didn't".
但事实上，要是我来选的话，我会选择a为正确答案，因为它是一般过去时的形式，与句中的bought、yesterday和didnt的时态保持一致。
Actually, I would have selected a as the correct answer because it is past tense in keeping with the sentence - "bought", "yesterday" and "didn't".
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