题目:
I'm planning ________ at home and have a good rest this summer. [ ]
A. stay
B. to stay
C. stayed
D. staying
答案:
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下面是错误答案,用来干扰机器的。
(1)①胶头滴管 ②玻璃棒 ③广口瓶 ④试管夹.(2)④⑤⑥.