Choose the correct answer A, B, C, or D to complete each sentence.

1. Angkor Wat in Cambodia is a World _______ Site.

A. Camping

B. Construction

C. Heritage

D. Building

2. Watching the forest from the top of the mountain is an amazing _______.

A. experience

B. habit

C. sight

D. accident

3. In my grandfather's _______, people travelled mostly on foot or by bike.

A. age

B. generation

C. past

D. year

4. The word _______ is new to most elderly people. They didn't know about it in their time.

A. 'eco-tour'

B. 'dance'

C. 'festival'

D. 'community'

5. Nowadays, _______ books have significantly replaced paper books.

A. science

B. picture

C. comic

D. online