Question

Bob spends a lot of money on books________he is not rich．

1. A.
   if
2. B.
   though
3. C.
   when
4. D.
   because

Answer 1

B
分析：Bob spends a lot of money on books和he is not rich之间是转折关系，所以用though，句子可以转换成Bob is not rich，but he spends a lot of money on books．注意：though和but不能同时用(在中文里是说“虽然……但是……”)