【单选题】
There isnt any difference between the two. I really dont know ____.
【单选题】
There isnt any difference between the two. I really dont know _________.
【单选题】
All of us think it difficult to ____ the difference between the two things.
【单选题】
A: Do you know that Tony quarreled with his brother? B: I dont know,[填空].
【单选题】
The work will be finished ___________ , but I dont know when.
【单选题】
[] I really dont like art, I will find his works impressive.
【单选题】
I really dont like the way[填空]he talks.
【单选题】
I dont know the park, but its____ to be quite beautiful.
【单选题】
I dont have to introduce the boy to you ___-you know him.
【单选题】
—He has two brothers and three sisters. Do you know____ of them?—No, I know ____ of them.