问题描述：
用所各词的适当形式填空
Mary sent ______ （I）a postcard yesterday afternoon
How is your sister going ______(do)that?
Some boys are practicing ______(fly)kites in the park.
-----Let’s go out for a picnic tomorrow morning.
----- ______ （sound）interesting
Mary sent ______ （I）a postcard yesterday afternoon
How is your sister going ______(do)that?
Some boys are practicing ______(fly)kites in the park.
-----Let’s go out for a picnic tomorrow morning.
----- ______ （sound）interesting
问题解答：
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