Security was such a major concern at the conference that no journalists could approach the meeting zone without ________ the special pass.
. ---How do you find your visit to the zoo? ---________
. On the wall _______ two large maps.
. Don’t you think it _______ that the new technique should be spread to more areas?
. The growing speed of a plant is influenced by a number of conditions, _______are beyond our control.
. The top leaders of the two states are holding a meeting in a friendly _______.