These diagrams are especially helpful when we have a concrete problem ______ at hand.
A.be solved
B.to solve
C.solved
D.being solved
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
根据n多题专家分析,试题“These diagrams are especially helpful when we have a concrete problem ______ at hand.A.be solvedB.to solveC.solvedD.being solved…”主要考查了你对 【现在分词的被动式】,【现在分词】,【不定式的被动式】,【过去分词】 等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
◎ 相似题
与“These diagrams are especially helpful when we have a concrete problem ______ at hand.A.be solvedB.to solveC.solvedD.being solved”考查相似的试题有: