—There aren’t any toys in our suitcase．Where have you put them?—Oh, no．That old lady sitting next to us ______ have taken ours by mistake.

(2013·成都一诊)The chairman ________ hold office for five years according to the constitution.

—____________you swim?   —Yes，but I’m not a good swimmer.

—That T-shirt with Yao Ming’s picture on it      belong to     David . He likes him a lot .—No, it      be his. He hates black color.

—Must I go there right now?—No，you ________.You ________ go there before supper.