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特别提示：a variety of、varieties of 的主谓一致问题 a variety of＋可数名词复数/不可数名词＋谓语动词单数 varieties of＋可数名词复数/不可数名词＋谓语动词复数 There is a variety of book to choose from. Varieties of books are being sold at this bookshop. [句 式 透 析] ※[教材原句]I was about to go back to sleep when suddenly my bedroom became as bright as day. 我刚要回去睡觉，突然我的卧室亮如白昼。 be about to do...“正要做……；就要做……”，句中的when是并列连词，相当于and just then或and just at that time，意为“正在这时/那时”。 并列连词when常用于以下句型： (1)was/were doing...when...正在做……这时…… (2)was/were about to do...when...正要做……这时…… (3)was/were on the point of doing...when...刚要做……这时…… (4)had just done...when...刚做完……这时…… 单句语法填空/完成句子 ①I was about ________ (surf) the Internet when the light went out. 我正要上网冲浪，这时灯突然灭了。 ②She was watching TV ________ the door bell rang. 她正在看电视，这时门铃响了。 ③We ________________ the telephone rang. 我们刚刚入睡，突然电话铃声响了。 ④[写作佳句] I ________________ to your home to help you with your English when my uncle came. | 
