若复数z=（x2-1）+（x-1）i为纯虚数，则实数x的值是[ ]
A.-1
B.0
C.1
D.-1或1
答案：A
根据句意,用所给动词的适当形式填空。
小题1:Time seems _______(go) faster when I am watching TV.
小题2:Her smiling face always makes us __________ (feel) very happy.
小题3:If you ____________ (not be) careful, you’ll make many mistakes.
小题4:Is Peter willing __________(share) his computer with his best friend, Daniel?
小题5:Listen! How beautiful the music ___________ (sound)!
—What row are you in?
—I'm in _____.[ ]
A．row one
B．one Row
C．the Row one
D．Row One
