The two ladies are ________ the same age, but there seems to be ten years ________ them.
| A．at, between | B．about, among |
| C．as, among | D．of, between |
We feel our duty to make our country a better place.
| A．it | B．this | C．that | D．one |
_____is our belief that improvements in health care will lead to a stronger, more prosperous economy.
| A．As | B．That | C．This | D．It |
—There is still a copy of the book in the library.Will you go and borrow_____?
—No，I’d rather buy_____in the bookstore.
| A．it；one | B．one；one | C．one；it | D．it；it |
It is often________that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
，please start the work tomorrow.
| A．If you are convenient | B．If it is convenient for you |
| C．If it is convenient of you | D．If convenience |