问题
Is_______ necessary to learn another language? — I think so.
A:this
B:that
C:it
D:he
B:that
C:it
D:he
正确答案是：
同类题型
My grandma ______ dinner when I got home yesterday.
The train ______ she was traveling was late.[ ]
The car accident happened ____ a cold winter morning. Luckily, no one was hurt.
She started to work a teacher in India in 1929.[ ]
Friends are those ___make you smile, always open their hearts to you and encourage you to succeed.