23. Infection is a common cause of chronic liver disease and is frequently managed with immunosuppressive therapy. However, treatment-emergent depression after therapy is frequent, _____ most studies report a risk of 10% to 40%.
(A)at
(B)as
(C)to
(D)when

19. The shocking and _______ truth is that the slaves on sugar plantations were forced to work 16 to 18 hours a day. (A)opprobrious (B)peripheral (C)ebullient (D)volatile

20. Democracy can’t ______ strikes that intimidate citizens and use force to influence policymaking. (A)flout (B)coddle (C)brook (D)parry

21. The word “class” means different things to different people. Class may be rank, tribe, culture and taste. At first, a person’s class is his parents’ class. Later, he may pick up a new hand of his own; it is likely to resemble _____ his parents, but not always. (A)by (B)between (C)than (D)that of

22. Dr. Nien was famously reluctant to have his biography written. But _____ Nien since 1990, Mr. Feng, the author of a critical study of Dr. Nien’s work, received not only his friend’s permission but access to a large collection of his manuscripts. (A)have known (B)having known (C)knew (D)to know

24. This “#24” uniform is special _____ the basketball player only wore it as a freshman, before switching to his high school career. It is believed to be the only authentic game worn “#24” in existence. (A)along (B)in (C)in that (D)of

25. My brother John has been _____ funds for the children who are suffering from the celiac disease. (A)rising (B)raising (C)raised (D)risen

26. _____ in charge of this company, I would make some big changes to save it. (A)Were I (B)I were (C)If I am (D)Had I been

27. Do you know what happened to Mary yesterday? She looked like _____! (A)she saw a ghost (B)she has seen a ghost (C)she had seen a ghost (D)she would have seen a ghost

28. Grammar: Choose one best answer. (A)My little cousin is a blabbermouth! He cannot resist to tell everybody my secret! (B)Tom got some kids in the neighborhood to clean up all the graffiti on the walls. (C)While Jack was shopping, he found a jacket that he really liked. After he had the sleeves be shortened, it fit him perfectly. (D)Ms. Hanson recommended our class divided into four sections for group discussion.

29. Grammar: Choose one best answer.(A)Whether molding into bars or shaping into hearts, kisses, or even bunnies, people worldwide love chocolate for its unique taste and the pleasure it gives. (B)Every year, scientists from all over the world travel there to work in conditions of extreme cold, with temperatures reaching minus 100 degrees Fahrenheit. (C)The children attended a special movie program consisted of cartoons that feature Donald Duck and Mickey Mouse. (D)If taking individually, swimming, cycling, and running are each very physically demanding sports that require endurance and stamina in order to be competitive.