问答题

Were safer in a train than we would be if we______any other way.
A．travel
B．travelled
C．have travelled
D．had travelled

A.
A．travel
B．travelled
C．have
B.had

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We can infer from Paragraph 2 that facing the tough task the researchers of WHO ______.
A．flinch from their work.
B．hesitate and feel perplexed.
C．carry on their research.
D．abandon their research.

A.
A．flinch
B.
B．hesitate
C.
C．carry
D.
D．abandon
E.

As for how much of IQ comes from the genes and how much come from experiences,______.
A．scientists have reached an agreement
B．scientists' opinions vary
C．no genes have ever been identified
D．scientists have found many smart genes

A.
A．scientists
B.scientists'
C.no
D.scientists