At present, she is not going . . . . . . . library. A. to B. at C. on D. up

The correct answer is: A. to

The word “to” is used to indicate a destination. In this case, the speaker is saying that the woman is not going to the library.

The other options are incorrect because they do not indicate a destination.

• The word “at” is used to indicate a location. In this case, the speaker is not saying that the woman is at the library.
• The word “on” is used to indicate a surface. In this case, the speaker is not saying that the woman is on the library.
• The word “up” is used to indicate a direction. In this case, the speaker is not saying that the woman is going up to the library.