_____you understand this rule ，you‘ll have no difficulty in dealing with such problems.
更新时间:2024-11-24 04:58:37 A、WhileD
once意思是“一旦”。while“当⋯⋯时候”;though“虽然”;unless“除非”。“一旦你明白了这个规则，处理类似的问题就不困难了。”显然，d符合句子意思的表达需要。
Itseemsasifthesun_____roundtheearthsinceitrisesintheeastandsetsinthewest.
Theteachergave_____theexaminationpaper.
“Itwasverycoldtesterday.”
“_____.”
Ifhe_____thestorekeeper‘sscissors，hewouldhaveforgottentobuyapair.
It‘s_____mypowertomakefinaldecisiononthematter.
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