THE DEVELOPMENT OF SYNTHETIC FABRICS ______ NEW CHALLENGES TO CHEMICAL ENGINEERS FORYEARS
3. The development of synthetic fabrics ______ new challenges to chemical engineers for
years.
A. bring
B. brings
C. has brought
D. to bring
3. The development of synthetic fabrics ______ new challenges to chemical engineers for
years.
A. bring
B. brings
C. has brought
D. to bring