A firm from New Zealand has revealed a set of robotic legs which they claim will soon allow ________ wheelchair-bound people to walk again.
There has been ____rising demand for grain as ____industrial material in spite of the nation’s good harvests.
He wondered if he could slip out of the lecture hall without anyone______.
We cannot figure out ____quite a number of insects, birds, and animals are dying out.
We have been told that under no circumstances_______ the office telephone for personal affairs.