The Premier says that bilateral relations will grow smoothly and steadily _____ both countries follow the principle contained in the joint documents.

The Premier says that bilateral relations will grow smoothly and steadily _____ both countries follow the principle contained in the joint documents.

A．as far as           B．though            C．unless            D．as long as

The Premier says that bilateral relations will grow smoothly and steadily _____ both countries follow the principle contained in the joint documents.

1. A.
   as far as
2. B.
   though
3. C.
   unless
4. D.
   as long as

 The Premier says that bilateral relations will grow smoothly and steadily _____ both countries follow the principle contained in the joint documents.

A. as far as                   B. though                   C. unless               D. as long as