—Which sweater do you prefer, the yellow one or the pink one?—______. I like a light blue one.

Emma ，can you introduce _______ to Alice ?I want to meet her .

I find ________ difficult to remember everything, though I’m still young.

The teacher found       difficult to believe that Tommy was the laziest boy in class.

----Mary doesn’t hear very well.----Yes, there is       with her ears.