单选题 When the girl is happy, she ______ sings or dances.

单选题 Lack of sleep started to ________ the quality of his work.

单选题 There are still some people in the world who __________ cold, hunger, and insufficient clothing.

单选题 We must adhere to the _________ that everyone must be treated fairly.

单选题 It was a long walk. Even now she could feel the ______ on her back and legs.

单选题 Look! ______ .

单选题 If the storm had happened in the daytime, there ______ many more deaths.

单选题 ______ Mary with a baby in her arms just when I was about to leave.

单选题 It is necessary ______ me ______ my studies before a new term.