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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.
____________, he began to make friends more easily.
A. Entered school in the new city, it was found that
B. When he had been entering the new school,
C. After entering the new school,
D. Upon entering into the new school,
____________, he began to make friends more easily.
A. Entered school in the new city, it was found that
B. When he had been entering the new school,
C. After entering the new school,
D. Upon entering into the new school,
AFTER + V_ing / clause
After having breakfast, Mary went to school.
After Mary had had breakfast, she went to school.
After having breakfast, Mary went to school.
After Mary had had breakfast, she went to school.
Đáp án C.