Who’s the man sitting under the tree? —-I don’t ___ this man, but I’ve ___ him.

At first, Alice didn’t study well in our class, but she ________ topping in our class with great efforts.

The ______ is _______ difficult to answer.

I can’t remember _______ you started doing the work.

ssage was very difficult, so in order to______what the writer really wanted to convey, I read it many times