When a person sneezes, we say "God bless you" because ______.
A.it's a tradition
B.the person is possessed of ma evil spirit
C.the person is ill
D.God will bless those who sneeze
When a person sneezes, we say "God bless you" because ______.
A.it's a tradition
B.the person is possessed of ma evil spirit
C.the person is ill
D.God will bless those who sneeze
Oncogenes are cancer-causing genes______.
A.that are always in operation in a healthy person
B.which remain unharmful so long as they are not activated
C.that can be driven out of normal cells
D.which normal cells can"t turn off
What is most difficult to do when we turn human values into a programmable code?
A.Determine what is moral and ethical。
B.Design some large-scale experiments。
C.Set rules for man-machine interaction。
D.Develop a more sophisticated program。
A.Y
B.N
C.NG
What does the author mean when he says, "we can't turn the clock back"(Line 1, Para. 3)?
A.It's impossible to slow down the pace of change.
B.The social reality children are facing cannot be changed.
C.Lessons learned from the past should not be forgotten.
D.It's impossible to forget the past.
What does the author mean when he says, "we can't turn the dock back" (Para. 3) ?
A.It's impossible to slow down the pace of change.
B.The social reality children are facing cannot be changed.
C.Lessons learned from the past should not be forgotten.
D.It's impossible to forget the past.
When we turn to some expressions which are less frequently used, we__________
A. may find them amusing and interesting
B. always feel unsure and worded
C. are not accustomed to the switch
D. probably feel strange and dismayed
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