问题
选择题
My cousin has been learning English _____she was six years old.
A．when
B．since
C．until
D．because
答案
答案：B
since是从…来的意思，经常在完成时中
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My cousin has been learning English _____she was six years old.
A．when
B．since
C．until
D．because
答案：B
since是从…来的意思，经常在完成时中