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1. If you are on a tight b
, I recommend that you buy the basic version because it's considerably cheaper.
【考点】
可数名词;
【答案】
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单词拼写（单句）
容易
课时演练
换一批
1. New scientific
(discover) are being made every day.
语法填空（单句）
普通
2. Natural gas is another abundant fuel that experts consider an
（可供选择的事物） to gasoline.
单词拼写（单句）
普通
3. A classic can generate various
(category) of literature and different versions of translation.
语法填空（单句）
普通