Complete these sentences using the verbs in brackets in the passive voice. Soon new technologies _______ (to develop).

The sentence requires the verb 'to develop' to be used in the passive voice. Since 'new technologies' is plural, we need to use 'are'. Also, because the sentence starts with 'Soon', we can assume it refers to the future. Thus, the future passive form of the verb 'to develop' is 'will be developed'.

Answer: will be developed