Generally speaking, in the United States ____ 15-percent tip is normal for ____ most restaurants.
| A．a; / | B．an; the | C．/; a | D．/; the |
.
— Why was Professor Johnson unhappy those days?
— Can’t you see it clearly? The only reason was that the theory he stuck to________ wrong.
| A．proving | B．being proved | C．proved | D．was proved |
.
You can see the stars on a clear night ,but in the daytime they are____
| A．unavoidable | B．invisible | C．inaccessible | D．unavailable |
.
______and ______,they ran out of room.
| A．Being excited;happily | B．Exciting;happy |
| C．Exciting;happily | D．Excited; happy |
.
.I like ____in the autumn when the weather is clear and bright.
| A．this | B．that | C．it | D．one |
.
_______,his idea was accepted by all the people at the meeting.
| A．Strange as might it sound | B．As it might sound strange |
| C．As strange it might sound | D．Strange as it might sound |