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
________ was most important to her,she told me,was her family.
It suddenly occurred to him ________ he had left his keys in the office.(2012·江西)
Have you noticed the problem ________ he is now in low spirits?________ come?
When the news came ________ the war broke out,he decided,to serve in the army.
________ was known to us all that Johnson had broken his promise ________ he would give each of us a small gift.