This problem is so tough that only______ students can solve it.
—Can I help you? —_________. How do I get to the train station?
—Excuse me, where is the hospital, please?—Not very far. It just takes you five minutes _________ there.
I think a lion is ______ugly animal.
The underlined letters “ow” in the word _________ sounds different from the others.
Don't forget ________ your homework with you when you come to school.