Select the correct article to fill the blank in the given sentence: "What are you doing for ...... Christmas?"

Select the correct article to fill the blank in the given sentence: She takes ...... dog for a walk.

Select the correct article to fill the blank in the given sentence. ......................Himalayas provides protection to India against enemies.

Select the correct article to fill the blank in the given sentence. Where is ...... book $I$ lent you last month?

Select the correct article to fill the blank in the given sentence. ........Thar Desert is the largest desert in India.

Select the correct article to fill the blank in the given sentence. .......... Kangaroos are mostly found in Australia.