At times, he felt ____ difficult to _______ himself to getting up early.
One of the most important questions they had to consider was _______ of public health.
Whatever he does, once he sets up a goal, he would start pursuing it without _______.
The author of the article believes that it is the test system, ______ teachers, that is responsible for the heavy burden of the middle school students nowadays.
Mr. Smith is ______ to attend the party to be held next Wednesday.
He would rather ______ his mother the truth.