假設語氣

第26至30題為題組
International trade is the exchange of goods and services between countries. Trade is driven by different production costs in different countries， making ___26___ cheaper for some countries to import goods rather than make them.
(A) them
(B) such
(C) what
(D) it

第26至30題為題組
___29___ international trade， nations would be limited to the goods and services produced within their own borders.
(A) Despite
(B) Between
(C) Without
(D) Under

第21至25題為題組
Finally， on 25 June 1977， a seventh and final bolt struck Sullivan as he was fishing in a pond. “I don’t believe God is after me，”” he theorized. “”If he was， the first bolt ______ 25 ______ enough. Best I can figure is that I have some chemical， some mineral， in my body that draws lightning. I just wish I knew.””
(A) was
(B) had been
(C) would be
(D) would have been”