阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。
Pregnant Women Warned About ACE Inhibitor Some of the
most commonly used medicines for high blood pressure are drugs called ACE
inhibitors. Doctors have given these drugs to patients for twenty-five years. A
government study in the United States found that the use almost doubled between
1995 and 2000. Doctors have known for years that women should
not take ACE inhibitors during the last six months of pregnancy. The medicine
can injure the baby. ACE inhibitors, though, have been considered safe when
taken during the first three months. But a new study has found that women who
take these drugs early in their pregnancy still increase the risk of birth
disorders. The study shows that, compared to others, their babies were almost
three times as likely to be born with major problems. These included problems
with the formation of the brain and nervous system and holes in the
heart. The researchers say they found no increased risk in women
who took other blood pressure medicines during the first three months.
Researchers at Vanderbilt University in Tennessee and Boston University did the
study. The New England Journal of Medicine4 published the results. The
researchers studied the records of almost thirty thousand births between 1985
and 2000. Two hundred nine babies were born to women who took ACE inhibitors
during the first three months of their pregnancies. Eighteen of the babies, or
almost nine percent, had major disorders. ACE inhibitors are
often given to patients with diabetes. But diabetes during pregnancy can result
in birth defects. So the study did not include any women known to be diabetic.
ACE inhibitors suppress a protein called angiotensin-converting enzyme, or ACE.
This enzyme produces a chemical in the body that makes blood passages narrow.
The drugs increase the flow of blood so pressure is reduced. New
drugs are tested on pregnant animals to see if they might cause birth defects in
humans. But experts say these tests are not always dependable. The United States
Food and Drug Administration6 helped pay for the study. The F. D. A. says women
who might become pregnant should talk with their doctor about other ways to
treat high blood pressure. Paragraph 2 ______