The rapidly growing birth rate brings about a lot of environment problems, which the government is supposed to take _____.

 I know what we're doing is legal, but ____ it doesn't feel right.

The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.

As he works in a remote area, he visits his parents only__________.

As soon as his teacher begins lecturing, he begins to doze off, not intentionally but _____.