单项选择题

A．He thought she should make a phone if anything went wrong.
B．He thought she should just wait for someone’s help.
C．He was afraid something would go wrong with her car.
D．He promised to give her help himself.
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单项选择题
A．alteringB．convertingC．rangingD．varying
A．altering
B．converting
C．ranging
D．varying
单项选择题
What is the primary objective of carrying out the Pine Gene Discovery Project
A．To speed up old-fashioned breeding methods.
B．To identify all the genes in the pine tree’s genome.
C．To find out what desired traits the pine trees have.
D．To make it easier to know which gene needs altering.
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