"Part-time" children______.
A. spend some of their time with their half brothers and some of their time with their half sisters
B. spend all of their time with one parent from the previous marriage
C. are shared between the two former spouses
D. cannot stay with "full-time" children
查看答案
A．alwaysB．sometimesC．seldomD．never
A. always
B. sometimes
C. seldom
D. never
The expression "speculated on" (Line 4) means______.
A. considered
B. suspected
C. expected
D. engaged in buying and selling
John was not a very good student at school.
A. Right.
B. Wrong.
C. Doesn't Say.
Which of the following statements is true？
A. The subjects in a cross-sectional research are not of the same age group.
B. The methods of study in longitudinal research will not change over time.
C. Longitudinal research is reliable only in seeking understandings of the effects of early experiences on later development.
D. Cross-sectional methods are not usually adopted in studying, for example, the changes in intelligence over a thirty-year period.
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