ou read the book, you’d better make a mark_____ you have any questions

I’m afraid he’s more of a talker than a doer，which is ________ he never finishes anything. (2011·山东，26)

I’d like to be on my own for a whileDo you mind—________Go ahead

We may meet all kinds of difficulties in the future, but we should be confident enough to any challenge.

Reading more helps________ learn better.