Scientists generally agree that earth’s climate will warm up over the next 50 to100 years_____ it has warmed in the 20,000 years since Ice Age.
I lost my way in complete darkness and, matters worse, it began to rain.
She had golden hair when she was a child, but_________ she got older and older, her hair went darker and darker.
__________she was invited to the ball made her very happy.
—ou___________ stop me.—Even if you __________it, I won't allow you to swim across the river.
He__________ he would be able to leave tomorrow, but it's beginning to took difficult.