1 . The librarian can't attend the meeting at 4 o'clock this afternoon because he ________ (occupy) himself in checking the new books. (所给词的适当形式填空)

2 . I am so thrilled, for at this time tomorrow we ______ (fly) over the Atlantic to Europe. (所给词的适当形式填空)

3 . Ladies and gentlemen, I________（update）you on the current news at BBC channel 4 at 7:00 pm tomorrow. (所给词的适当形式填空)

4 . We can’t go hiking this time tomorrow, because we ________________(sit) an exam. （所给词的适当形式填空）

5 . —Can I see you at three this Friday, Peter?
—Sorry, I _____________________ (give) a lecture at that time. How about Saturday? (所给词的适当形式填空)

6 . The presenter ________ (demonstrate) his project at 15:00 next Monday. (所给词的适当形式填空)

7 . — Can I use your computer this afternoon?
— Sorry, I _________(take) an online class at that time. (所给词的适当形式填空)

8 . Don’t phone or text our manager between 13:00 and 15:00 tomorrow, because he _______ (attend) an important seminar then.(所给词的适当形式填空)

9 . —Can I call you back at two o’clock this afternoon?
—I’m sorry, but by then I ____________ (fly) to Beijing. How about five? (所给词的适当形式填空)

10 . The weather report says that it ____________ (rain) when we hold the sports meeting. (所给词的适当形式填空)