When their children lived far away from them,these old people felt ______from the world.( )
carried away
broken down
cut off
brought up
The national park has a large collection of wildlife, _________ from butterflies to elephants.
ranging
range
to range
ranged
In the 1950s in the USA, most families had just one phone at home, and wireless phones _______ yet.
haven't invented
haven't been invented
hadn't invented
hadn't been invented
If you don't understand something, you may research, study, and talk to other people _______ you figure it out.
because
though
until
since
Many airlines now allow passengers to print their boarding passes online ______ their valuable time.
save
saving
to save
saved
Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
why
where
how
when