A-A+
By the end of this century business ______gre
问题详情
By the end of this century, business ______greatly.
A．will be changed
B．will have changed
C．changes
D．changed
参考答案
正确答案：B
解析：Future perfect tense indicates a future action that will occur before another future action. Choice (A) is the passive form. of the future. Choice (C) is the present tense. Choice (D) is the past tense.
