Before becoming successful (A), Charles Kettering, former vice president of General Motors, was so poor (B) that he has to (C) use the hayloft of a barn as (D) a laboratory.
A.A
B.B
C.C
D.D

If he comes (A) to see (B) me yesterday, I would (C) have taken (D) him to the movies.
A.A
B.B
C.C
D.D

The organizers of the charity were more than surprised (A) at how many (B) people lined up to receive the clothes donating (C) by the outgoing (D) mayor.
A.A
B.B
C.C
D.D

If a rash occurs (A) within twenty-four hours after taking (B) a new medication (C), the treatment should discontinued (D).
A.A
B.B
C.C
D.D

It has been found (A) that the length of light or dark periods influence (B) certain activities (C) of flowering plants (D).
A.A
B.B
C.C
D.D

Major advertising (A) companies have traditionally (B) volunteered its (C) time to public (D) service accounts.
A.A
B.B
C.C
D.D

The professor had already given the homework assignment (A) when he had remembered (B) that Monday (C) was (D) a holiday.
A.A
B.B
C.C
D.D

In 1975, according (A) to (B) the National Center for Health Statistics, the average life expectancy for people born during (C) that year is (D) 72.4 years.
A.A
B.B
C.C
D.D

Tea did not become (A) popular in Europe until the mid 17th century when it (B) has been (C) first (D) imported to England and Holland.
A.A
B.B
C.C
D.D

The process of making (A) Egyptian sun-dried mud brick are much (B) the same today as it (C) was (D) in prehistoric times.
A.A
B.B
C.C
D.D