题目内容
It ____ Jack twenty minutes ____ the math problem yesterday.
| A.took; to work out | B.takes; worked out |
| C.has taken; work out | D.is taking; working out |
A
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Do you know in what circumstances was it____________ Jack achieved his goal?
| A.how | B.where | C.when | D.that |
It ____ Jack twenty minutes ____ the math problem yesterday.
|
A.took; to work out |
B.takes; worked out |
|
C.has taken; work out |
D.is taking; working out |