Many students signed up for the _______ race in thesports meeting to be held next week

The workers ________ the glasses and marked on each box “This Side Up”．[ ]

Since Tom downloaded a virus into his computer, he can not open the file now[ ]

Your father never watches the drama series on TV, __________—–_____________________. He thinks these drama series are boring and dull.

I’d like to call you at 10 o’clock nextFriday morning if it is convenient.—I’m afraid I _______ an important meeting.