1 . By the time the applicant makes up his mind, the offer __________ (cancel). (所给词的适当形式填空)

2 . By the time I come back in ten years’ time, all these old houses ________ (pull) down. (所给词的适当形式填空）

3 . Hopefully in 2025 we will no longer be e-mailing each other, for electronic communication tools ______ more convenient by then.

A．have developed	B．have been developed
C．will have been developed	D．will have developed

4 . By the time he comes tomorrow, all the rooms ________ (paint).(所给词的适当形式填空）

5 . By the end of 2021, several other metro lines ______. （complete）(所给词的适当形式填空)

6 . According to a plan, Hainan___________into a tourism and consumption destination with global influence by 2035.

A．will build

B．will have been built

C．are built

D．have been built

7 . As is estimated, more than 20 million shared bikes ______ into operation nationwide by 2025.

A．will have been put

B．will have put

C．have been put

D．will be putting