问题
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;
B:it
C:which
D:this;
正确答案是：
同类题型
The teacher always encourages us English.
Teaspoons are used______ things.
So suddenly _____ the disease that the whole family were at a great loss.
The number of people whoa mobile phonemore than 650.
What’s wrong with the little girl after the long running? — She is ____and looks very uncomfortable