_______ of my classmates could work out the maths problem because it was too difficult.
A lot of meetings were ______because of the dangerous disease.
We enjoy______the moon in the open air on the Mid-autumn Day.
----Do you think Jim will pass the Chemistry exam? ----Sure. He ______a lot of time on it.
He ______the bus and found a seat next to the window.
----What are you doing, Emily? ----I’m ______the radio. The music is so beautiful.