Question 26. I'm very grateful ___________ her for her help.

A. on

B. of

C. about

D. to

V. Read the text and choose the correct answer A, B, C, or D for each of the gaps.

EARTHWATCH

Have you ever wanted to do something different? Five years ago, Will Slade read about (27) _____ organization called Earthwatch. Earthwatch finds volunteers (28) ______ expeditions (29) ______ and explore different parts of the world.

Will decided (30) ______ an expedition to study elephants in Africa. "I wasn't sure about it before I went." say Will. "But in fact, I really enjoyed every minute of the expedition. We slept (31) ______ tents and we cooked our own food, but it was the great (32) ______ elephants and all the other animals there". "I've (33) ______ all the expeditions, and I have seen some fantastic places. How (34) ______ people have slept (35) ______ a beach, climbed a mountain, or see a whale? This world is such a beautiful place, but it's disappearing fast. We have to learn more (36) ______ it if we are going to save it."

Question 27.

A. a

B. the

C. an

D. some

Question 28.

A. to

B. for

C. at

D. on

Question 29.

A. studying

B. studied

C. study

D. to study

Question 30.

A. to join

B. join

C. joining

D. joined