用括号内所给单词的适当形式填空。
1. How _____________ (old) is your father?
2. Is this _____________ (Mike) pencil?
3. There are two _____________ (knife) on the desk.
4. Amy and I _____________ (be) good at Chinese.
5. It was a _____________ (cloud) day.

【考点】疑问词组,复数名词,名词所有格,形容词,系动词

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