Choose the best answer A, B, C or D to complete the sentence. Question 9. When he was ten, he set up a small laboratory after he _____a book his mother showed him. A: had read B: reads C: has read D: read

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Question 9. When he was ten, he set up a small laboratory after he _____a book his mother showed him.

A: had read

B: reads

C: has read

D: read

A bạn nha .chắc đúg luôn 

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