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
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