He thought he must have made a mistake somewhere. He went through his calculations again.
He thought he must have made a mistake somewhere. He went through his calculations again.
A. Thinking he had made a mistake somewhere, he would go through his calculations again.
B. Thinking he must have made a mistake somewhere, he went through his calculations again.
C. He went through his calculations again before he went thought of making mistake somewhere.
D. He thought to have made a mistake somewhere and had gone through his calculations again.
Đáp án B
