写出单词或词组的正确形式。1. (pen) This is ________. These are ________.
2. (This is / These are) ________ ________ paper.
3. (pencil case) These are ________.
4. (This is / These are) ________ ________ scissors.
5. (chalk) This is ________.
试题答案
1. a pen, pens 2. This is 3. pencil cases 4. These are 5. chalk
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