In much of the animal world，night is the time________for sleep—pure and simple.

Fully ________ in looking after three children at home, she no longer has time to enjoy   various activities in the club.

Thank you for the trouble that you had ________me with my studies.

(2013·南昌一中月考)Thousands of visitors were ________ to the Xi'an International Horticultural Exposition the day it opened.

 Painting from still images leads to a loss of sensitivity, which is _______ to an artist.