The boy was busy with his homework when I came in.The boy was busy his homework when I came in.

admin2011-01-18 54

问题 The boy was busy with his homework when I came in.The boy was busy ______ ______ his homework when I came in.

选项

答案in doing

解析

转载请注明原文地址:https://kaotiyun.com/show/81qd777K

公共英语一级笔试

相关试题推荐

随机试题

最新回复(0)