Mary has been working for a whole day. I think it's time______.
A．she has a rest
B．she can have
C．she had a rest
D．she would have

声音卡简称声卡，是PC机组成部件之一。下面是有关声卡功能的叙述 Ⅰ．可以对输入的模拟声音信号进行采样和量化，以转换为数字波形形式 Ⅱ．能将数字声音还原为模拟声音信号 Ⅲ．能进行混音和音效处理 Ⅳ．可合成MIDI音乐 以上叙述中，哪些是正确的?A．仅Ⅰ和ⅡB．仅Ⅰ、Ⅱ和ⅢC．仅Ⅰ和ⅢD．全部 点击查看答案

— What's the noise? It must be from upstairs.—______, It's the window-cleaner working next door.A．I'm not sureB．I hope notC．I'd rather notD．I don't think so

A.—______,
B.
A．I'm
C.I
D.I'd
E.I

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