摘要： -Why did he come back? -It is he forgot to take his umbrella with him. A. for B. as C. since D. because
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— Why did he come back?
— It is ______ he forgot to take his umbrella with him.
— It is ______ he forgot to take his umbrella with him.
[ ]
A. for
B. as
C. since
D. because
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B. as
C. since
D. because
— Why did he come back?
— It is _____ he forgot to take his umbrella with him.
— It is _____ he forgot to take his umbrella with him.
[ ]
A. for
B. as
C. since
D. because
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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
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—Why did he come back?
—It is ______ he forgot to take his umbrella with him.
| A．for | B．as | C．since | D．because |