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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: He started doing his homework at home at 7 p.m. a) He has started doing his homework at home for 7 p.m. b) He has done his homewo

Toán Lớp 8: He started doing his homework at home at 7 p.m.
a) He has started doing his homework at home for 7 p.m.
b) He has done his homework at home since 7 p.m.
c) He have done his homework at home since 7 p.m.
d) He has done his homework at home for 7 p.m.

Comments ( 1 )

  1. đáp án: b) He has done his homework at home since 7 p.m.
    ta loại a vì đó ko thuộc cấu trúc chuyển từ QKĐ-> HTHT
    loại C vì he ko đi với have
    loại D vì 7p.m là mốc thơi gian=> dùng since ko dùng for
    =>chọn B

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222-9+11+12:2*14+14 = ? ( )