. Mary_____ to college last year. Unluckily, she couldn’t take the examination because of a sudden disease. A must have gone B can have gone C should have gone D could have gone
. Look! There is a whole crowd of people over there. Go and see what_____ and if it is a bargain, buy it. A is selling B is being sold C has been selling D has been sold
With a series of strange phenomena_____ , people living in the small village began to suspect that the earthquake was coming. A to happen B happening C happened D being happened