I won’t call you, ________ something unexpected happens.

   A. unless       B. whether         C. because         D. while

I won’t call you, ________ something unexpected happens.

   A. unless       B. whether         C. because         D. while

I won’t call you, __________ something unexpected happens.

A. unless   B. whether   C. because   D. while

.I won’t call you, __________ something unexpected happens.

A. unless B. whether

C. because      D. while

 I won’t call you, ________ something unexpected happens.

   A. unless       B. whether         C. because         D. while