There are so many interesting books in the shop that i can't make up my mind which ____.A.to buyB.buyC.boughtD.buying

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Therearesomanyinterestingbooksintheshopthatican''tmakeupmymindwhich____.A.tobuyB.buyC.boughtD.buyingT

There are so many interesting books in the shop that i can't make up my mind which ____.A.to buyB.buyC.boughtD.buying
There are so many interesting books in the shop that i can't make up my mind which ____.
A.to buy
B.buy
C.bought
D.buying

There are so many interesting books in the shop that i can't make up my mind which ____.A.to buyB.buyC.boughtD.buying
A
which to buy属于“疑问词+不定式”的名词性结构;
B.buy是谓语动词形式
C.bought过去分词
D.buying现在分词
后三个都不能和which连用

A
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