What happens when a mixed colony of Polyergus and Formica ants become too large?
A.The Polyergus workers enlarge the existing nest.
B.The captured Fonnica workers return to their original nest.
C.The Polyergus and the Formica build separate nests.
D.The Polycrgus and the Formica move to a new nest.

If you think carefully (A) before making (B) your decision, you will avoid to get (C) into trouble later (D) .
A.carefully
B.making
C.to get
D.later

Caroline refused taking (A)the job given (B)to her because (C)the salary was (D)not good.
A.taking
B.given
C.because
D.was

The word “recruit” in paragraph 4 is closest in meaning to __________ .
A.create
B.enlist
C.endure
D.capture

The word “excavate” in paragraph 3 is closest in meaning to __________ .
A.find
B.clean
C.repair
D.dig

What does the author mean by stating that “The dulotic species of ants ... are the supreme social parasites”?
A.The Polyergus are more highly developed than the Formica.
B.The Formica have developed specialized roles.
C.The Polyergus are heavily dependent on the Formica.
D.The Formica do not reproduce rapidly enough to care for themselves.

__________if they had feathers instead of hair?
A.Can people possibly fly
B.Could people be able to fly
C.Will people possibly fly
D.Would people be able to fly

He can't go out because he __________his work.
A.doesn't finish
B.hasn't finished
C.didn't finish
D.hadn't finished

Carol is excited__________her new job.
A.for starting
B.to starting
C.about starting
D.. for start

You__________write to her for she'll be here tomorrow.
A.don't
B.mustn't
C.needn't
D.haven't