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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.
__________several unsuccessful attempts, Robert Peary reached the North Pole on April, 6th 1909.
A. After
B. When
C. He made
D. Then
__________several unsuccessful attempts, Robert Peary reached the North Pole on April, 6th 1909.
A. After
B. When
C. He made
D. Then
After + clause (past perfect), clause (simple past)
After we had finished our test, we handed in for teacher.
Before + clause (simple past), clause (past perfect)
Before we went to Mike's house, we had contacted to him
After we had finished our test, we handed in for teacher.
Before + clause (simple past), clause (past perfect)
Before we went to Mike's house, we had contacted to him
Đáp án A.