Talking with my parents is ____difficult for me. They never understand me. — Don’t worry . Nothing is difficult if you try your best.

I’ve tried hard to improve my English.But by no means ________with my progress.

I didn’t realize my mistake________my teacher had a facetoface talk with me.[ ]

Mary has been looking forward in the past 10 yearsto______the Great Wall.

What do you think of the four classics (名著) of China—They are wonderful, but I’ve read of them.