Question

I usually.... (go) to bed at 11 o'clock

Answer 1

The correct answer would be "I usually go to bed at 11o'clock".

In this sentence, 'go to bed' suggests going to sleep or prepare for sleep.

It is an idiom.

The meaning of the sentence is that the person mostly goes to sleep at 11o'clock but not always.

Moreover, according to the rules of preposition, the preposition 'at' is used with time.

Answer 2

Answer:

anita ( go) to bed 11 o clock always