Chia động từ trong ngoặc ở thì Hiện tại hoàn thành

        1.    I (live) ______________ here since 1989.

        2.    They (work) ______________ for this factory for 20 years.

        3.    He (read) ______________ this novel three times.

        4.    Hoa and I (know) ______________ each other since we were at the same class.

        5.    I (not see) ______________ her since last month.

        6.    I (not/work) ______________ have not worked today.

        7.    We (buy) ______________ a new lamp.

        8.    We (not /plan) ______________ our holiday yet.

        9.    Where (be/ you) ______________?

        10.  He (write) ______________ five letters.

        11.  (be / you) ______________ at school?

        12.  School (not/start) ______________ yet.

        13.  (speak/he) ______________ to his boss?

        14.  No, he (have / not) ______________ the time yet.

        15.  The cat (just/catch) ______________ a mouse.

        16.  He (already/ invite) ______________  his friends.

        17.  Julia (make) ______________ a table with three columns.

        18.  The teacher (lose) ______________ the keys, so he can’t open the door.

        19.  I (just/clean) ______________ my bike.

        20.  My friends (give up) ______________ smoking.