问题
选择题
.
If a computer crashes, you will lose the file you _________unless you save it regularly.
A．are working
B．work
C．will work
D．worked
答案
答案：A
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.
If a computer crashes, you will lose the file you _________unless you save it regularly.
A．are working
B．work
C．will work
D．worked
答案：A