Not until 1911.... .
A.identified the first of the vitamins
B.the first of the vitamins identified
C.was the first of the vitamins identified
D.the first of the vitamins was identified

Only after the film started.... that.... it before.
A.I realized / I had seen
B. did I realize /I had seen
C.I realized / had I seen
D.did I realize / had I seen

Seldom cactus plants are (A) found (B) outside (C) of (D) North America.
A.cactus plants are
B.found
C.outside
D.of

No sooner had (A) the secretary hang (B) up than (C) the phone rang again (D).
A.had
B.hang
C.than
D.again

Never before (A) I have (B) seen a man who enjoyed (C) being lied to (D).
A.before
B.I have
C.enjoyed
D.lied to

Not (A) until yesterday I met (B) them for (C) the first time in my life (D).
A.Not
B.I met
C.for
D.in my life

Hardly had we (A) arrived at (B) the hotel that (C) there was a (D) power cut.
A.had we
B.at
C.that
D.a

No sooner had I turned (A) out the light when (B) I heard a (C) noise outside (D)
A.had I turned
B.when
C.a
D.outside

Not (A) only Jack broke (B) his leg, but (C) he also injured his (D) shoulders.
A.Not
B.Jack broke
C.but
D.his

Only after (A) checking (B) three times I was (C) certain of (D) the answer.
A.after
B.checking
C.I was
D.of