問題詳情
20. Dyscalculia is a learning difficulty that impacts students' ability to do math. Children with dyscalculia usuallyhave difficulty_______ numbers, symbols, and related concepts.
(A) understand
(B) understanding
(C) to understand
(D) to understanding
參考答案
用户評論
【NIAN LEE】評論
Have difficulty +Ving 「在⋯方面困難的」