39. We / interested / playing / badminton / every / afternoon.

A. We do interested at playing badminton every afternoon.

B. We are interested at playing badminton every afternoon.

C. We are interested in playing badminton every afternoon.

D. We are interested of playing badminton every afternoon.

40. Finding / hotel / isolated island / not easy.

A. Finding hotel in an isolated island is not easy.

B. Finding a hotel in isolated island is not easy.

C. Finding a hotel at isolated island is not easy.

D. Finding a hotel in an isolated island is not easy.