This book is ___hard ___understand.
I can’t stand _____ for you so long.
How many ________ are there in the park?
—I am going to Millie’s birthday party this evening, Mum.— , and remember to come back before 10.00 p.m.
—Excuse me, how can I get to the post office?—Go the bridge and turn left. Walk the museum, and you’ll see it.
— enjoy Beijing opera with me?— Good idea.