首页 › 答案 › 题库 › 超星尔雅学习通未分类

If you want to become an effective impromptu speaker, you need to() your energies and efforts in your speaking bank.

If you want to become an effective impromptu speaker, you need to() your energies and efforts in your speaking bank.
A.scenic
B.invest
C.flavors
D.subject
正确答案:B