It will be difficult ________ a robot_________ same things as a person,A. of, to do B. for, to do C. for, doing
---Do you like fruits? ---No, I don’t like them_____.
I’m sorry I took your backpack______ .
If you want to know the meaning of the word______, you’d better look it up in the dictionary.
—There’s ______ time left. You don’t need to hurry, Jack. —But I want to see her as early as possible.
Another thing that he _________ very difficult was English grammar.