It is human nature to think back to a golden age ______ one’s country was strong and respected

Great changes ______ in my school in the past ten years

I don’t suppose Jimmy could have done well in the midterm exam last week, ________?— ________, he almost failed in the exam.[ ]

In order to improve our spoken English， we should make much in our pronunciation.

It was after he had read the requirements _______ Mr. Black realized the task was too difficult to be finished.