____ it is to play football on such a cool afternoon.

_____ do you learn English? — By listening to tapes and reading aloud．

The panda isn’t _____to go through the hole.

You’ve dropped _______ “s” in the word “success”. ―Oh, _______ letter “s” is doubled.

What do you think of your host family, Jim?—Great. They try ________ best to make me feel at home.