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Câu hỏi: Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
__________ for about 4 weeks, we now can perform most of the tasks confidently.
A. Being trained
B. Training
C. Having train
D. Having been trained
__________ for about 4 weeks, we now can perform most of the tasks confidently.
A. Being trained
B. Training
C. Having train
D. Having been trained
Đáp án D.
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