I would appreciate ______ if you could let me know in advance when the meeting will be held.

I am very thirsty. Could you please give me ______ water?

Many people complained about the stones lying on a road, but _______ did anything about getting the stones out of the way.

 The fact that she can't talk makes      ________  difficult for her to communicate with her new classmates.

—Which of those electronic dictionaries do you like most? —        . They are both expensive and of little use.