Exercise

Exercise A

10. The whales headed south for the winter

(R) The Whales : subject

headed : verb

for the winter : preposition

Exercise B

9. The plane from New York circling the airport

(R) The plane : subject

from New York : preposition

circling : verb

TOEFL Exercise

10. NASA's Lyndon B. Johnson Space Center ______ control center for the Mercury, Gemini, and Apollo space flight.

a. It was at the

b. It was the

c. was the (*)

d. the

*i choose c because in this sentence we miss the verb, so that to conplete this sentence we must find the verb in the answer. Why I don't choose B, because in B we can see another subject, and when we choose B it will be double subject. So that, I choose C because we just need the verb that is was.