YDT Grammar and Vocabulary Practice

5. A polymath is a person whose expertise spans a significant number of different subject areas and such a person ---- complex bodies of knowledge to solve specific problems.

A) bring about

B) carry out

C) give away

D) call off

E) draw on

6. For the first time, doctors ---- the blood type of human lungs from Type A blood to Type O, which is an experimental step toward creating universal organs that ---- into any patient, regardless of blood type.

A) had changed / would be transplanted

B) are changing / must be transplanted

C) have changed / used to be transplanted

D) changed / could be transplanted

E) will change / should be transplanted

7. According to a legend, Alexander the Great forced his troops ---- onions as he believed it ---- whether they were resilient enough.

A) having eaten / could prove

B) to eat / would prove

C) to be eaten / might have proven

D) eating / must have proven

E) to have eaten / had to prove

8. For 28 years, the Berlin Wall ---- communist East Germany from West Germany, ---- the era of the Cold War and the Iron Curtain.

A) had separated / to represent

B) was separating / having represented

C) separated / representing

D) will have separated / represented

E) has separated / to have represented