the population of the united states is about 295 million,that of china ,the population of the united states is about 295 million,_____ that of china ,almost the same size as america,is 1.3 billion.a.as b.when c.while d.since
问题描述：
the population of the united states is about 295 million,that of china ,
the population of the united states is about 295 million,_____ that of china ,almost the same size as america,is 1.3 billion.
a.as b.when c.while d.since
答
C
答
while... 表示前后两句的对比.
答
C while 而,然而,隐含前后两者有比较之意.
答
d.since 知道那时起