11. Bill is in class 12, _______ John, who is a year older, is only in class 4.
a. and b. whereas c. either d. nevertheless
12. You must leave at once, ________ you miss the train.
a. however b. yet c. still d. otherwise
13. You need to get some job retraining. _______ it, you risk being laid off.
a. If so b. If not c. With d. Without
14. Could I have rice_______ potatoes, please?
a. but b. but also c. instead d. instead of
15. _______His denial, we knew that he was guilty.
a. Despite b. In spite c. Because d. And
16. John's family is very happy_______his being a warded a scholarship.
a. because of b. if c. either d. nor
17. Graphite is a soft, slippery solid that is a good conductor of_______ hear and electricity.
a. not just b. and c. both d. moreover
18. The lecture was _______ interesting and instructive.
a. as b. either c. neither d. both
19. Both Mary and Allen_______Jean are going on the tour.
a. as well b. as well as c. nor d. but
20. He likes travel, and_______ does she.
a. too b. such c. so d. but