Select the most appropriate option to fill in the blank.
 _______ he became a minister, he didn’t allow any of his relatives to live with him.

Options

A. As soon as
B. As long as
C. In order that
D. In case

Explanation

If we say that something happens `ul("as soon as")` something else happens we mean that it happens immediately after the other thing. However, the sentence states as soon as he became a minister ,he didn’t allow his relatives to stay with him. So, the second action was taken as soon as he became Minister. Hence, `ul("as soon as")` is the most suitable answer.