Color TV was first shown in 1929. It took more than two decades,________,until 1951, for color broadcasts to begin in the USA.
A. anyway B. therefore C. otherwise D. though
–How about going to Beijing for our holidays?
–That’s splendid. ___________.
| A．It’s really hot. | B．It’s none of my business. |
| C．I’m with you on that. | D．I’m looking forward to it. |
There are many mistakes in your composition and ________, it needs improving.
| A．so | B．then | C．yet | D．therefore |
Sixty people were _______ from the burning ship, but a great many more were drowned when it sank.
| A．protected | B．prevented | C．rescued | D．escaped |
The life he was used to _________ that year, when the terrible earthquake happened in his hometown.
| A．changing | B．change | C．changed | D．be changed |
–What’s the noise?
–It’s the drill. Since the beginning of the term, the workers _______ our heating system.
| A．are repairing | B．have been repairing | C．will be repairing | D．repair |