I have been reading the interesting book (since two days ago).对括号的部分提问.速求、、

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I have been reading the interesting book (since two days ago).对括号的部分提问.速求、、

I have been reading the interesting book (since two days ago).对括号的部分提问.速求、、
I have been reading the interesting book (since two days ago).
对括号的部分提问.速求、、

I have been reading the interesting book (since two days ago).对括号的部分提问.速求、、
how long have you been reading the interesting book?
或者 when did you begin to read the interesting book?

when have you been reading the interesting book ?

Since when have you been reading the interesting book?