结构 全句只有1个谓语动词:is。整个句子是一个完全倒装句,按照正常语序句子主干应该是:The GG strain of Lactobacillusis among the most promising and most thoroughly researched probiotics。过去分词短语discovered by作为后置定语修饰the GG strain of Lactobac...
3.She spent a lot of money on clothes / (in) buying clothes. 【点拨】spend 意为“花费”,通常接表示时间或金钱的名词,构成:spend ... on sth 或 spend ... (in) doing sth,表示“花费……在……上”。 4.It's a pity that our team lost the game this time. 【...
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