We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

A. since      B. if         C. unless       D. until

We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

A. since      B. if         C. unless       D. until

We’ll have a picnic in the park this Sunday _________ it rains or it’s very cold.

      A. since            B. if               C. unless          D. until

We'll have a picnic in the park this Sunday ________ it rains or it's very cold.

A．since?? B．if? C．unless?? D．until

We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

A. since　 　 B. if　 　　　　 C. unless D. until

We’ll have a picnic in the park this Sunday ________ it rains or it’s very cold.

A. since　 B. if　 C. unless　 D. until

We’ll have a picnic in the park this Sunday _______it rains or it’s very cold.

A .since　　　　 B. if　　 C .unless　　　 D. Until

 We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

  A. since      B. if         C. unless       D. until

We'll have a picnic in the park this Sunday ______ it rains or it's very cold.

1. A.
   since
2. B.
   if
3. C.
   unless
4. D.
   until