This is the tree and these are the flowers.
句子為陳述句。根據(jù)句中指示代詞this和these以及and,可知句子為并列句。故this或these都可置于句首,this 后需跟be動(dòng)詞單數(shù)is及名詞單數(shù),句中沒有不定冠詞a,故用the tree,these為復(fù)數(shù),其后需用be動(dòng)詞復(fù)數(shù)are,及可數(shù)名詞復(fù)數(shù)flowers. 中間用and連接。故本題答案為:This is the tree and these are flowers. / These are flowers and this is the tree.