Susan ___ hear the speaker because the crowd was cheering so loudly.
A. mustn't
B. couldn't
C. can't
D. needn't
mustn't: không được
couldn't: không thể
can't: không thể
needn't: không cần
Động từ trong câu chia ở thì quá khứ (was cheering) nên ta hiểu ngữ cảnh của câu là ở quá khứ.
=>Susan couldn't hear the speaker because the crowd was cheering so loudly.
Tạm dịch: Susan đã không thể nghe được người phát ngôn nói gì bởi vì đám đông la hét quá lớn.
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