应该是book吧
B
前面一个特指桌子上的那本,the
后面就是说一本有用的书,用a或是an
但useful开关的u是辅音字母,用a
Is ( ) look on the desk ( ) useful one
Is ( ) look on the desk ( ) useful one
A.the;an B.the;a C.a;the D.the;不填
A.the;an B.the;a C.a;the D.the;不填
英语人气：437 ℃时间：2019-12-21 13:12:13
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