问题补充:
Paul was not allowed to work he was fully recovered from the flu.
A. even if
B. whether
C. because
D. until
答案:
A. even if
B. whether
C. because
(答案→)D. until
解析: A. even if即使,B. whether是否,C. because因为,D. until直到,句意:Paul不被允许工作直到他的流感完全恢复。这里使用了not…until…“直到…才…”,选D。