It was not until the early 1950s ______most tape recorders began using plastic tape as they do today.
| A．when | B．which | C．that | D．Before |
A cool rain was falling_________with snow causing heavy traffic．
A．mixed B mixing C．to mix D．having mixed
Hesitating what to do，________．
| A．so let’s not go outing | B．the tour was cancelled |
| C．but we should still take the tour | D．we had to stay home |
The man stopped his bicycle beside the car______it had a broken chain．
| A．or | B．until | C．as | D．yet |
Mike has an active mind；he can retell a story_________anybody else in the classroom．
| A．more vividly than | B．much vivid than |
| C．as vivid as | D．so vividly as |
The attackers were arrested and didn’t know where they ______．
| A．would take | B．are taken | C．were being taken | D．will be taken |