Be careful_______ these chemicals, they may do harm_______ your health.
A.of – for
B.of-to
C.with – for
D.with-to

He looked tired because he _________ for six hours.
A.had run
B.had been running
C.has run
D.
was running

Instead of _______ about the good news, Hilary seemed to be indifferent.
A.being excited
B.to excite
C.being exciting
D.to be excited

She is the youngest________ to take part in this talent contest
A.competitiveness
B.competitor
C.competitive
D.competition

A/ an ____ is a person who is trained for traveling in a spacecraft
A.astronaut
B.scientist
C.technician
D.engineer

Human being have great ___________ on the rest of the world
A.attention
B.influence
C.attraction
D.focus

_________is a great source of energy but very dangerous.
A.Wind energy
B.Nuclear power
C.Water power
D.Solar energy

Choose the word that has the stress differently from that of the other words.
A.pollutant
B.condition
C.survival
D.animal

Choose the best answer to complete the blank in each of the followingsentencesOur office is equipped______ advanced technology.
A.on
B.about
C.with
D.in

He seldom goes to the library, ______?
A.isn't he
B.is he
C.does he
D.doesn't he