There are many skirts in this shop. I can't choose                  .

A. what to buy                   B. which one to buy   C. to buy which one     D. to buy which

There is no difference between the two sweaters，so I really don't know_______

A．which choose one                        B．which to choose one

C．to choose which one                     D．which one to choose

We have two rooms ________, but I can't decide ________.

A. to live; to choose which one

B. lived; choose which one

C. live; which one

D. to live in; which one to choose

There are so many toys on the table. The child does not know ________.

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There are a lot of food on the table. I don't know ________.

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