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Câu hỏi:
Choose A, B, C, or D to indicate the correct answer to each of the following questions: Since Helen ______ 10 years old, she has mastered Braille as well as the manual alphabet and even learned to use the typewriter.
- A. was
- B. were
- C. will be
- D. has been
Lời giải tham khảo:
Đáp án đúng: A
Phương pháp giải:
Kiến thức: Sự phối hợp thì
Giải chi tiết:
Cấu trúc kết hợp thì quá khứ đơn & hiện tại hoàn thành trong câu:
Since + S + Vquá khứ đơn, S + Vhiện tại hoàn thành (have/has + P2): Kể từ khi ….
Chủ ngữ “Helen” số ít ⇒ tobe dùng “was”
Tạm dịch: Từ khi Helen 10 tuổi, cô đã thành thạo chữ nổi Braille cũng như bảng chữ cái thủ công và thậm chí còn học cách sử dụng máy đánh chữ.
⇒ Chọn A
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