I was about to leave the office ______ an unexpected visitor came.A. while B. as C when D. before
—Do you like the material? —Yes, it ___________ very soft.
—Where is Xiao Wang? —I don't know.He__________ be in the library.
Bread and butter____________ for breakfast in many Chinese homes nowadays.
Is this the restaurant ___________ ?
—Will you go fishing with me? —___________.