____ either of your parents come to see you recently?
| A．Have | B．Had | C．Has | D．Is |
—The terrible accident is under investigation.
—Actually, quicker action ______ those workers trapped in the mine.
| A．might have saved | B．must have saved | C．should have saved | D．could have saved |
The road ______ for vehicles is under repair. Drivers are required to take s
ome other routes.
| A．meaning | B．meant | C．to mean | D．being meant |
I’m very amazed that they knew nothing about ______ he was a thief.
| A．that | B．which | C．what | D．the fact that |
So convenient ______and saves your time that many people would like to do that.
| A．is shopping on net | B．shopping on net does | C．does shopping on net | D．shopping on net is |
Have you ever seen a doctor? If ______, what happened?
| A．any | B．ever | C．not | D．so |