I regret _____ you that Tom failed to pass the driving test and that he really regretted ______ your advice on practicing more.
With the price of pork and eggs _______ quickly, CPI has become a hot phrase among Chinese.
To improve the quality of our products, we asked for suggestions _______ had used the product.
With more forests being destroyed in that area, huge quantities of land _______ deserts each year.
—Excuse me sir, where is the room 301? —Just a minute. I’ll get Bob _______ you to your room.
However, at times this balance in nature is disturbed, _______ a number of possibly unforeseen effects.