Color TV was first shown in 1929. It took more than two decades, ________,until 1951, for color broadcasts to begin in the USA.A. though B. therefore C. otherwise D. anyway
In college, you will discover ______ learning is about, from teacher-taught to self-learner.
Since the end of the war, many of the priceless antiques ______ to their rightful owners.
_______the money shortage, many small companies closed down.
Do you know the thief_______by the police.
How do you _______it and what should you ________it?