题目:
Choose the right answer to fill in the blanks. (选择正确的词填空。)
A: Dad. 1___________ my cat?
B. Is it in your bed?
A: No, it 2___________.
B: Oh, look! 3___________ under your bed.
A: Yes, it 4___________. Thanks.
B: 5__________.
A. It’s B. isn’t C. is D. where’s E. You’re welcome
答案:
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下面是错误答案,用来干扰机器的。
①O2 ②CO ③CH4 ④空气中的N2