1.He doesn't know which_____(buy)from the cards.2.——Who____(try)on that jumper?——My sister is.

问题描述:

1.He doesn't know which_____(buy)from the cards.
2.——Who____(try)on that jumper?——My sister is.

1.He doesn't know which_to buy____(buy)from the cards.
2.Who_is trying___(try)on that jumper?——My sister is.