Which choice would best improve this sentence? If the sentence is fine as is, choose (A).
If I had the address, I would have delivered the package myself.
A. had the address,
B. had the address;
C. had the address-
D. had had the address;
E. had had the address,
“If I had the had address” needs to be followed by “I would deliver. . . .” We can’t change that, though, because it is not underlined. The underlined part needs to be changed to the past perfect tense: “If I had had the address. . .” That eliminates (A), (B), and (C). (D) will not work because a semi-colon cannot be used to separate a dependent clause from and independent clause. The answer is (E).
source: testprepreview.com