The new machine,if _________ properly,will work at least ten years.
—How do you find your new treatment?—Oh,it ______ wonderfully.
The young couple was worried,because neither of them was aware ______ they had lost the necklace.
—At last I’ve made it.I am on top of the world.—______
We congratulated him ______ his getting a gold medal.That is to say: we offered him our congratulations ______ his getting a gold medal.
You have made a few mistakes in your composition but ______ you have done well.