The Collectors

When I came into the office, my boss ______ for me.

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
When I came into the office, my boss ______ for me.
A. waited
B. waits
C. was waiting
D. is waiting
Giải thích:
Hòa hợp thì:
QKTD + when + QKĐ hoặc When QKD, QKTD
Tạm dịch: Khi tôi đến văn phòng, thì sếp đang đợi tôi.
Đáp án C.
 

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