He asked several questions_______ the professor who gave us a lecture_______the balance of nature

28 What you said____quite to the point but what we need____experiencedtechnical workers

She has set a new record，that is，the sales of her latest book _____ 50 million.

I think yourfather is very busy.–So he is._______he still takes a walk with us sometimes.

u regret paying five hundred dollarsfor the painting”“No, I would gladly have paid______for it”