English Grammar in Use

Exercise 33.4.4
They shop is open everyday from 8.30. It's 9.00 now, but the shop isn't open yet.

My answer
The shop should have been opened.

Exam answer
The shop should have opened by now.

I think my answer is aslo correct, because we can use passive voice here. Shop can be open by someone. Am I right.
Thanks in advance.

Question

English Grammar in Use

Exercise 33.4.4
They shop is open everyday from 8.30. It's 9.00 now, but the shop isn't open yet.

My answer
The shop should have been opened.

Exam answer
The shop should have opened by now.

I think my answer is aslo correct, because we can use passive voice here. Shop can be open by someone. Am I right.
Thanks in advance.

Answer

The book answer is correct and natural.

English grammar has the active voice, middle voice, and passive voice.

Examples:
The man opens the shop at 8.30 every day. [active voice, active meaning]

The shop opens at 8.30 every day. [middle voice, passive meaning]

The shop is opened at 8.30 every day (by the man). [passive voice, passive meaning]

More examples:
The eggs cooked/cooks/will cook in five minutes.

The eggs burned/burn/will burn in ten minutes.

The door opened/opens/will open.

The door closed/closes/will close.

Answer

Yours make sense but adding “by now” makes it clearer