阅读下面短文，用括号内所给动词的适当形式填空（必要时可加助动词或情态动词）
The largest problem among teenagers is that they are too stressed. Mary, a 16-year-old girl, 小题1: .(worry) about her exams very often. Although she小题2: .(study) English for three years, and is good at it, she is still afraid of English exams. Last night, after小题3: .(come) back home, she 小题4: (begin) to get ready for her English exam. While she小题5: (read) English books, her mother said to her, “Come on, dear! It’s time小题6: (.have) supper!” But Mary 小题7: (not listen) to her mother. She went on reading. Her mother went on, “Mary, I believe you. You can pass your exam tomorrow.” But Mary still went on studying. At 11:30 the light in her room 小题8: ( be )still on. Her mother said to her, “I think teenagers 小题9: (go) to bed earlier before exams than usual.” Mary agreed, but she 小题10: .(not fall)asleep. She was too nervous. Maybe it is time to solve the teenagers’ problems.
小题1:worried
小题2:has studied
小题3:coming
小题4:began
小题5:was reading
小题6:to have
小题7:didn’t listen
小题8:was
小题9:should go
小题10:couldn’t fall
题目分析：这篇短文以一个十六岁的女孩玛丽为例，讲述了玛丽所面临的压力问题。
小题1:结合语境可知本句描述的是过去的动作，故动词用过去时态，填worried。
小题2:联系本句时间状语for three years,可知本句描述的是到现在已经完成的动作，主语she是的单数第三人称，故填has studied。
小题3:本句中after是介词，后面一般接名词或者动名词作宾语，根据所给单词come，可知填动名词coming。
小题4:联系前文时间状语last night昨晚，可知本句描述的是过去的动作，故用一般过去时态，填began。
小题5:联系下文可知句意为：当她正在读英语书时，描述的是过去（昨晚）正在进行的动作，故用过去进行时态。句子主语she是单数第三人称，故助动词用is的过去时态，was，填was reading。
小题6:it’s time后面接名词时用介词for，接动词时用不定式符号to，根据所给单词可知填to have。
小题7:联系上下文可知这是昨晚的动作，故用一般过去时态，填didn’t listen。
小题8:联系上下文可知这描述的是昨晚的状态，故用一般过去时态，填was。
小题9:think后面一般接should do的虚拟语气，认为应该怎么样。故填should go。
小题10:联系上下文可知句意为：但是她不能睡着，本句同样描述的是过去的状态，故用can的过去时态could，填couldn’t fall。
点评：由于本题已经给出所需单词，故完成比较简单。解答此类题型的方法一般就是根据上下文及时间状语，主语的人称与数，判断出动词的时态和数的变化，然后进行适当的词形变换，完成阅读。