Be careful when you cross this very busy street.If not ,you may _____run over by a car .
| A．have | B．get | C．become | D．turn |
It is most instructive lecture that I _______ since I came to this school.
| A．attended | B．had attended | C．am attending | D．have attended |
The shocking news made me realizeterrible problems we would face.
| A．what | B．how | C．that | D．why |
—That must have been a long trip.
—Yeah, it________us a whole week to get there.
| A．takes | B．has taken | C．took | D．was taking |
Maybe if I________ science, and not literature then, I would be able to give you more help.
| A．studied | B．would study | C．had studied | D．was studying |
It is still under discussion __________the old bus station should be replaced with a modern hotel or not.
| A．whether | B．when | C．which | D．where |