I'm sorry I didn't answer your call because I online.( )
was studying
studied
am studying
–That clothes store is _____ on weekends. --I see. I’ll go there next Monday then.
-- Which of the two T-shirts would you like?-- ________. I don't like their styles.
Do you know _an "o" and _ "u" in the word "computer"?
What ________ it is to have a picnic in ________ weather!
-Linda, shall we go and watch Holland Dafeng Flowers next month?-_______ we have the tickets.