Unless ________ , the murderer is likely to commit similar or further offences.
| A．to arrest | B．arrested | C．been arrested | D．arresting |
When the news came the war broke out, he decided, to serve in the army.
| A．since | B．which | C．that | D．because |
Bring the flowers into a warm roomthey'll soon open.
| A． | or | B． | and | C． | but | D． | for |
around the fire, the tourists danced with the local people.
| A．Gather | B．To gather |
| C．Gathering | D．To be gathering |
He had no sooner finished his speech the students started cheering.
| A．since | B．as | C．when | D．than |
I'll go to the library as soon as I finish what I
| A．was doing | B．am doing |
| C．have done | D．had been doing |