Complete the text with the appropriate form, active or passive, of the verbs in brackets: The first mobile phones (1) (construct) in Stockholm in the 1950s, but were not very mobile! They could only (2) (use) in cars because the receiver and transmitter (3) (weigh) over 40 kilos and had to (4) (carry) in the boot. (advance) so quickly that by the 1990s (hold) in the hand and people talking (7) But technology (5) mobiles (6) (become) a familiar sight. Of course, not everyone wel- comed mobiles, and in the mid-1990s their use (8) (ban) in many schools. Even recent research which (9) (sug- gest) that prolonged exposure to emissions from mobiles might be a health haz- (not discourage) their use, and analysts now (11) ard (10) (predict) that by 2025, 95% of all electronic communica- tion (12) (conduct) by mobile phone.​