Mary is so quiet a girl that she seldom speaks in public places unless _____ to.
| A．is spoken | B．is speaking |
| C．speaking | D．spoken |
Neither of her parents wanted her to _____ her cousin.
| A．marry | B．marry to |
| C．marry with | D．marry for |
I _____ you yesterday, but you weren’t in.
| A．rang | B．rang to |
| C．rang with | D．rang to |
No matter how much you’ve learned and how high a standard of education you have had, you must _______ the people heart and soul.
| A．serve | B．serve for |
| C．serve to | D．serve on |
. If you want to sell your product you must _____ it.
| A．advertise | B．advertise for |
| C．advertise on | D．advertise to |
New medicines and instruments ______ every day to extend life.
| A．develop | B．are being developed |
| C．are developing | D．have developed |