The government has taken some measures to solve the shortage of electricity, but it may be some time __________the situation improves.
Last Monday, I was asked to give the new students a test ________ their English level.
He was educated at the local high school, _________ he went on to Beijing University.
— Is there anything wrong. Bob? You look sad.—Oh, nothing much. In fact, I ______ of my friends back home.
Choosing the right dictionary depends on ______ you want to use it for.
We all know that, _______, the situation will get worse.