He was told that it would be at least three more months _____ he could recover and return to work.

 ________ hard it might be,  I will work it out.

_____difficulty we will face, we should have confidence and try to solve it.

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

Tom looked upon the test as an obstacle _____ his classmates regarded it as a challenge.