12. A: What is the net around the bed for? B: It ________ to stop bugs from _______ in.(A) is used ;
問題詳情
12. A: What is the net around the bed for? B: It ________ to stop bugs from _______ in. (A) is used ; flying (B) is using ; fly (C) is used; to fly (D) was used; be flown