Drinking water, having a healthy diet and taking exercise are all positive ways to ________ you when you are working on a tight schedule.

While studying, fix your mind on what is really important, or you will _____ remembering nothing.

He got up quickly as soon as the alarm clock _______.  

(2013·新课标全国卷Ⅰ)At the last moment, Tom decided to ________ a new character to make the story seem more likely.

– Can I ask you a few straightforward questions about yourself? -- No problem. I like ______ when people are open and direct.