The machine has been used many years it doesn’t work well occasionally.A. That’s becauseB

问题补充：

The machine has been used many years it doesn’t work well occasionally.

A. That’s because

B. It’s no wonder that

C. There’s no doubt if

D. It’s unlikely that

答案：

A. That’s because

(答案→)B. It’s no wonder that

C. There’s no doubt if

D. It’s unlikely that

解析：t’s no wonder that …难怪……。A中because 要改为why; C中if要改为 that。