Mark the letter A, B, C, or D on your answer sheet 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 trained
D.Having been trained
________ for about 4 weeks, we now can perform most of the tasks confidently.
A.Being trained
B.Training
C.Having trained
D.Having been trained
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Hóa Học lớp 12
