Choose the best answer
1. If the river is not dirty, there will be more fish
A. There will be less fish if the river is not dirty
B. There will be more fish unless the river is not dirty
C. Unless the river is dirty, there will be more fish
D. Because the river is dirty, there will be more fish
Choose the best answer
1. Many tourists want to visit Sa Pa because the air is fresh
A. Although the air is fresh, many tourists want to visit Sa Pa
B. Many tourists want to visit Sa Pa because of its fresh air
C. Because many tourists want to visit Sa Pa, the air is fresh
D. Many tourists want to visit Sa Pa , so the air is fresh