Judging from what has happened here, it’s high time that we _______effective measures to prevent this.

He postponed his holiday so as to __________ the deadline for his work.

Where is Mother?—She is in the kitchenShe ______the housework all morning

(2013·甘肃兰州、靖远名校高三模拟)Social practice is an opportunity for students to gain________better understanding of how________society operates

I’m not surprised that he became a writer. Even as a child he had a(n) __________imagination.