10. Hydrogen is a ______ of all organic compounds. (A) competition (B) compartment (C) company (D) c
12. Mary got two job offers. ______ she accepted. (A) much of which (B) both of whom (C) most of who
13. Henry got sick the day he ______ his new job. (A) was to start (B) was started (C) will start (D
14. Neither of the students ______ that both mystery writer Agatha Christie and inventor Thomas Edis
16. I am not sure ______ you agree with his theory. (A) to what extent (B) as regards (C) on the who
17. She wrote an excellent essay ______ with a certain amount of help. (A) even so (B) as well as (C
18. He is a great poet ______ his work has had a great influence on other writers. (A) apart from (B
19. It is hard to ______ between these two similar plants. (A) differ (B) different (C) differentiat