题文
(2012·安徽) A lot of language learning, __________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
| A．as |
| B．it |
| C．which |
| D．This |
推荐试卷
(2012·安徽) A lot of language learning, __________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
| A．as |
| B．it |
| C．which |
| D．This |
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