38. A nation’s balance is considered unfavorable if it more money on imports than it gains from exports.
a. will spend b. would spend
c. can spend d. spends
39. _____ the secret of how to make silk remained inside Asia, Europeans were forced to pay incredibly high sums of money for this mysterious material to be brought overland to Europe.
a. Although b. Only if
c. Since d. Because of
40. _____ Marge is an honest person, I still wonder whether she’s telling the truth about the incident.
a. In spite of b. Since
c. Though d. If