–I’m sorry I really can’t work it out.—Try again, Liu Fang. It’s only ____ difficult for you. You can make it.
Linda, with her parents,_______ the Wolf Hill, and they will be back this afternoon.
Wearing white can help people _______when they feel stressed.
David didn’t give up ______ he had failed in the experiment four times.
一Look! That teacher is explaining something to her students again and again!一_______teacher she is!
Lucy liked all the dresses there,but she took the ______one to save as much money as possible for Project Hope.