It is ten years since the scientist ______ on his life’s work of discovering the valuable chemical.
The zookeeper was really annoyed with me.— How could he have been if you______stones at the animals?
—What do you do as a volunteer in North Africa?—__________! There are many poor people who need a lot of help.
They’ve moved to a different house_________their children can attend a better school.
The Alibaba Group, _____was founded in 1999, has become China’s largest e-commerce company.
A storm buried Illinois under several inches of snow on Tuesday,______at least 100 people dead in traffic accidents.