— Why did he come back?— It is _____ he
题型:选择题
问题:
— Why did he come back? — It is _____ he forgot to take his umbrella with him. |
A. for B. as C. since D. because |
— Why did he come back? — It is _____ he forgot to take his umbrella with him. |
A. for B. as C. since D. because |