The demand for _____ skilled workers is still increasing.

I have little doubt about his competence; ______, he is well-qualified for the job. 

We often say that something is “as light as air”, but air is＿＿＿light. 

---- You don’t go to that supermarket quite often, do you?  ---- No, I only go there ______ because it’s too far away from my house.

--- I __________ agree with what he said. Actually I feel what he said is much to the point and makes good sense. --- Yes, I think so.