__________（他们三人）tried to finish the task before sunset.
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We've tried it three times. Must we try it ________（第四次吗）?
The accident happened on the afternoon of ________（七月七日）.
We are to have a small test on __________（星期一早晨）.
It's _________（乘车一小时）from my homtown to our university.
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