用所给词的适当形式填空when is your ______(cousin)birthday which is the_
用所给词的适当形式填空when is your ______(cousin)birthday which is the_____(nine)one
用所给词的适当形式填空when is your ______(cousin)birthday?
which is the_____(nine)one?
how old_____(be)mary and kate?
her sister is five_____(month)old.
we have a_____(china)speech contest in may.