CHUYÊN ĐỀ 3 SỰ HÒA HỢP GIỮA CHỦ NGỮ VÀ ĐỘNG TỪ (AGREEMENT BETWEEN SUBJECTS AND VERBS)
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Not only the students but also their instructor………..to the principal’s office. A. is calling B. call C. have been called D. has been called

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Not only the students but also their instructor………..to the principal’s office.

is calling

call

have been called

has been called

Giải thích

Chọn D