Read the paragraph carefully. Type the correct tense of the verb in each blank box. The infinitive form of the verb is shown in brackets immediately after each blank. When you have completed the exercise, click Check to see your score and identify any mistakes. You may click Show Solution to view the correct answers, or Retry to clear your answers and attempt the exercise again.
请仔细阅读短文，并在每个空格中填写正确的动词时态。每个空格后括号中的单词为动词原形，供参考使用。 完成练习后，点击 Check（检查答案） 查看得分并检查错误。
您可以点击 Show Solution（查看答案） 查看正确答案，或点击 Retry（重新尝试） 清除答案并再次完成练习。
Level: | CEFR B2-C1 |
Duration: | 20 minutes |
Difficulty | Hard |