In addition, teaching staff is willing to extra help if a student needs.A、p

游客2023-09-24  25

问题 In addition, teaching staff is willing to      extra help if a student needs.

选项 A、providing
B、provide
C、provides
D、provided

答案 B

解析 在be willing to短语中,to是不定式的标志,其后应该跟动词原形。be willing to do sth.是“愿意/乐意做某事”的意思。这种用法的to有很多,如be likely/happy to do sth.。
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