Henry goes to a free class every Sunday afternoon which______at 4 pm.

-- It's so cold! Why are your windows still open?         --- Oh, they _______．

—Do you love teaching, Miss He?—I fell in love with teaching in 2000. I ________ for twelve years by this summer.

---Do you know the timetable of the school bus? ---Sure, the first trip________ at 6:30 a.m. and usually continues until 4 p.m. on weekdays. 

If the weather had been better, we could have had a picnic. But it ____  all day.