DNA的半保留复制(semiconservative replication)

A. Using new cups and spoons．
B. Eating meals at the right time．
C. Stopping eating after feeling full．
D. Working hard after meals．

A. She will learn well because of her passion for it．
B. She will pass the exam because the teacher says so．
C. She needs some more time to know about it．
D. She should put more efforts into her lessons．

A. The woman doesn"t really like her English teacher．
B. The English teacher is not responsible at all．
C. The woman doesn"t like too much homework．
D. The woman should review her lessons today．

A. She worries that Esther can"t take care of herself．
B. She doesn"t believe Esther"s learning ability．
C. She pushes her to start as early as possible．
D. She disagrees at first but finally agrees．