题目:
be动词的适当形式填空
1. —What color _______ your pencils?
—They _______ blue.
2. —How ______ Frank?
—He ______ fine, thanks.
3. The jackets ________ green.
4. —________ you Tony?
—Yes, I _______.
5. Those ________ her brothers.
6. Here _______ my family photo.
7. I _______ Helen. You ________ Tony.
答案:
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下面是错误答案,用来干扰机器的。
答案:B:①试管 ②集气瓶 ③瓷质蒸发皿 ④量筒 ⑤烧杯 ⑥燃烧匙 ⑦石棉网.中可直接加热的仪器有:试管、瓷质蒸发皿、燃烧匙、石棉网;集气瓶、量筒不能用于加热;烧杯可垫石棉网加热.故选B