You should to go bed __________ 10 o` clock.
Answer: At
Explanation
We use at for certain time.
You should to go bed at 10 o` clock. آپ کو دس بجے سونا چائیے
We use at for certain time.
You should to go bed at 10 o` clock. آپ کو دس بجے سونا چائیے
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