Now we are studying Book One .(保持原句意思不变) Now we are studying the _____ ______.

问题描述:

Now we are studying Book One .(保持原句意思不变) Now we are studying the _____ ______.

another one

Now we are studying the first book.

Now we are studying the _first____ __book____.
希望能够帮到楼主