Task 4. Use THE PRESENT PERFECT TENSE or THE PRESENT PERFECT CONTINUOUS
to fill in the blanks:

23. Tom is reading a book. He started two hours ago and he is on page 53. He ……………………………… (read) for two hours.
24. I …………………………………………………. (write) my friends at least a dozen letters since I left home and come home.
25. The telephone …………………………………………….. (ring) four times in the last hour, and each time it has been for my roommate.
26. A: ………………. you ……………….. (see) Jane recently?
B: No, I ……………………………. (see) her for a long time.
27. Susan …………………………. (do) her homework before 10 o’clock but Jane ………….…………….. (not /write) a word until now.
28. Sally is writing a letter to her boyfriend. She ………………………………………. (write) it since she got home from class. It’s going to be a long letter.
29. I …………………………………………………. (not / be) able to reach my boss on the phone yet. I ………………………………………………………. (try) for the last twenty minutes.

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