现学现用
1. This special cream will protect your skin burning by the sun.
A. from B. in C. to
2. We must water from being polluted, because it’s the source of life.
A. consider B. leave C. protect
3. —He appeared about fifty years of age.
—No, that’s not true. He had just finished his sixtieth birthday.
A. is B. are C. to be