The applications of genetic engineering are abundant and choosing one appropriate for this case can be rather difficult.

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问题 The applications of genetic engineering are abundant and choosing one appropriate for this case can be rather difficult.

选项 A、sufficient
B、plenty of
C、adequate
D、countable

答案B

解析 基因工程的应用繁多,要从中为这个案例选择一种是很困难的。划线单词abundant意思是“充分的,富裕的”,与plenty of含义相同。sufficient“充足的”,adequate“合适的,充分的”,countable“可计算的”,sufficient和adequate的含义重在“(数量)合适”,不能成为正确答案。
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