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