【题目】—Is this _________ ruler?

【题目】Don't eat so (quick). We have enough time.

【题目】 In those days bikes were not ______ used because few people could afford (负担起) to buy one.

【题目】--- I hit a tree on the way to meet my friend at the railway station.

【题目】 --- Could you tell me how to get to Xuzhou Station，please？

【题目】Little Jerry (brush) his teeth every morning.

【题目】I think I want to join the (swim) club.

【题目】Susan has the flu. She go to the doctor.

【题目】It's necessary for us to learn ________ each other.