I COULD HAVE UNDERSTOOD HIM IF HE _______ MORE SLOWLY

24/ I could have understood him if he _______ more slowly.

A.could speak B. spoke C. had spoke D.had spoken

V. Read the following passage and choose the best answers.

Tropical rain forests are found in Amazon region of South America, central America, Africa, South and

South east Asia. Rain forests are very important to the world’s climate. The Amazon rain forests alone

receive about 30 to 40 percent of the total rainfall on the earth and produce about the same percentage of the

world’s oxygen. Some scientists believe that the decrease size of rain forests will affect the climate on the

earth, making it uncomfortable or even dangerous for life. Saving our rain forests is an international problem.

One country, or even a few countries can not solve the problem alone. The nations of the world must work

together to find a solution before it is too late.

Questions :