单项选择题

Many things（）impossible in the past are common today.

A．to consider
B．considering
C．being considered
D．considered

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单项选择题
I'll lend you my computer（）you promise to take care of it.

A．unless
B．while
C．as
D．if
单项选择题
（）fails to see this will make a big mistake.

A．Whoever
B．Whatever
C．Anyone
D．Who
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