三、主从复合句和某些连接用语的用法1. We could go to a concert _ youd prefer to visit a museum. (TEM4-1992-49) C A. if B. because C. unless D. since2. _ their policy can be changed the future for that country will be indeed bleak. (TEM4-1993-46) B A. Even if B. Unless C. Now that D. As long as3. She said she would work it out herself _ ask me for help. (TEM4-1993-47) DA. and not to B. but notC. and prefer not D. rather than4. David Singer, my f