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.
—Jenny took the 8:00 bus to Shanghai this morning. —Really? She ______ the 9:00 train. It's much more comfortable and safer to travel by train.
Hi, sir. Some students want to see you. ______ they wait here or outside?
You can't imagine what difficulty we had ______ home in the snowstorm.
—Will there be a shower tomorrow? —There ______ be. Let me make a phone call to find out.
—Keep your voice down. Otherwise, Tommy will hear what you say. — ______ ? I don't care.