Scientists generally agree that Earth's climate will warm up over the next 50 to 100 years ________ it has warmed in the 20,000 years since Ice Age.
Give them a hand this time and I am sure they will offer theirs ______ in the future.
Don’t turn round. Go ______ this street till you see the school.
You can go to the newspaper library and _____ any information you need for your new story.
Many policemen and soldiers are ______ the forest _____ the prisoner escaping from prison.
When _____, the man said he went home at 2:00 a.m., _____ and only _____ his house broken into.