20 ABOUT THE PRACTICE TOEFL
1. The main point of this passage is that ...
A. Carbon tetrachloride can be very dangerous when it is heated
B. The government banned carbon tetrachloride in 1970
C. Although carbon
tetrachloride can legally be used in industry, it is not allowed in home
products.
D. Carbon tetrachloride used to be a regular part of cleaning compounds
2. The word “widely”...