问题
The company has a free long-distance telephone number _____ customers may call with any question they have about its products[ ]
A: so that
B: although
C: even if
D: as though
B: although
C: even if
D: as though
正确答案是：
同类题型
The boy is often found _____in reading books [ ]
Only when ________ the tea-house ________ it was the same place he had been in last year. [ ]
The boy has made rapid progress in English this term, _____ the teacher praised him yesterday.
The doctor asked me _______ more fruit and vegetables to keep healthy.