34. 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.
—Why does the lake smell terrible? —Because large quantities of water _____.
Sarah hopes to become a friend of_______ shares her interests.
After years of overwork, my father’s health ____ and he had to retire from business.
_____ you may have, you should gather your courage to face the challenge.
—My cousin would like to risk _____ the weight-loss pills rather than _____ in a gym. —Really? She must be mad.