Judging by the ________ he keeps, Mark must be an extremely wealthy man.

The word “ungelievable” based on Chinese, which has become a big hit online very quickly, ____a message that Chinese can also serve as an addition to English vocabulary. 

(2013·安徽高考)This project requires close teamwork. ________ will be achieved unless we work well together.

 ______ the works of Leonardo da Vinci, the Louvre Museum has more than 6,000 other European paintings, ranging from the13th century to the 19th century.

 It seems that the young man and the lady have little __________.