—It look like rain. Why not take ______ umbrella with you?
—Thank you. But I don't think it's necessary.[ ]
A. a
B. an
C. /
D. Several
答案:B
—It look like rain. Why not take ______ umbrella with you?
—Thank you. But I don't think it's necessary.[ ]
A. a
B. an
C. /
D. Several
答案:B