Question

1.she is very old, ______she canstil

She is very old，_______ she can still look after herself．（　　）

A. but

B. because

C. unless

D. if

Answer 1

答案：A but，但是；because，因为；unless，除非；if，如果；根据句中信息"She is very old"和"she can still look after herself"之间是转折关系；故选A．