Regular child care provided outside home or by someone other than the mother does not in i

tself undermine healthy emotional connections between mothers and their 15-month-old infants, according to a long-term national study. The finding holds even if care begins during the first 3 months after birth and runs for 30 hours or more per week.

Among infants who receive unkind and unresponsive care from their mothers, however, the mother-child relationship may be damaged. "This research helps us put apart complexities regarding child care that have not previously been studied in detail," contends Jay Belsky, a psychologist.

The investigation consists of 1,153 children and their families living in or near Boston. The youngsters, no more than 1 month old when they entered the study in 1991, will be tracked until the age of 7. Experimenters administered questionnaires to mothers in their homes and videotaped baby caretakers interacting with the kids at ages 1, 6, and 15 months. Independent observers rated the quality of each child care efforts and noted infant nervousness. Unlike most previous studies, this one allows researchers to observe each caretaker's personality at child nursing, and kids' emotional reaction by the equipment.

From the first paragraph we know that ______.

A．mother care is the best according to a national study

B．child care outside home is the best in accordance with the study

C．regular child care outside home may play a role as a mother

D．connections between mothers and infants are damaged by outside care

2).According to the passage,unresponsive care from a mother may______.

A.ruin a kid's growth

B.injure a baby's emotional reaction

C.spoil a child's personality

D.harm the mother-child tie

3).Jay Belsky implies that the study of child care______.

A.was interesting,but very difficult to make discovery

B.was never carried out in the past

C.was not much done in detail in the past

D.was greatly ignored by psychologists and researchers

4).The main difference between the investigation and the previous ones is that______.

A.the observers could rate the quality of child care efforts and analyzed them soon

B.video equipment enabled researchers to observe what was happening directly

C.the researchers were able to give the questionnaires to mothers in their homes

D.the researchers started with only one month old infants

5).Which of the following is not TRUE of the investigation？

A.Some independent observers play a part.

B.Researchers paid site visits to see a caretaker's personality and kids' emotional reaction.

C.Cooperation from the mothers is also necessary.

D.It will last at least 7 years.