题干
—What do you think of the book, Nancy?
—I think it's both useful and _______.
A：enjoyable
B：enjoys
C：enjoyment
D：enjoyed
答案(点此获取答案解析）
A
—What do you think of the book, Nancy?
—I think it's both useful and _______.
A：enjoyable
B：enjoys
C：enjoyment
D：enjoyed
中，
则
的值为