2025中考英语必考语法填空培优专练（含答案）

1、阅读下面短文，用括号内所给动词的适当形式填空(必更时可加情态动词或助动词)。 If you've ever stayed up late and then gotten up early the next day, you know what it's like not to get enough sleep. It's very uncomfortable feeling. In fact, for many years scientists     1    (believe) that sleep is like food - if we don’t get enough of it, we might get sick or even die. But now they     2     (start)to wonder just how much sleep we need. Researchers at Imperial College London did a study on fruit flies(果蝇). They found that flies that slept for very short periods of time - about72 minutes a day -still     3     (live) about as long as flies that slept for normal amounts of time. One of the female slept for just 4 minutes each day on average. This has led the researchers to wonder if sleep is less necessary than we previously thought. Humans are very different from fruit flies. Sleep     4    (help) repair tissue (组织) when our bodies