Eleven days after her son Benjamin's birth by C-section, Linda Coale awoke in the middle o

f the night in pain, one leg badly swollen. Just【C1】______her doctor returned her phone call asking what to do,she dropped dead【C2】______a blood clot(凝块).

Pregnancy-related deaths like Coale's【C3】______to have risen nationwide over the past decade, nearly tripling in the state with the most careful count-California. And【C4】______they're very rare--about 550 a year out of 4 million births【C5】______--they're nowhere near as rare as they should be. Pregnancy-related death rate is four times【C6】______than a goal the federal government【C7】______for this year. "It's unacceptable," says Dr. Mark Chassin of The Joint Commission, the agency which recently issued a(n)【C8】______to hospitals to take steps to【C9】______mothers-to-be. "Maybe as many as half of these are【C10】______."

Two years after Coale's death near Annapolis,Maryland, her sister says【C11】______that list should be warning women about【C12】______of an emergency, like the clot called deep vein thrombosis(DVT)that can kill【C13】______it breaks out of the leg and moves to the lung. "【C14】______she wanted to do was have her own family, and when she【C15】______gets that privilege, she's no longer【C16】______us," says Clare Johnson, who says her the sister's【C17】______risk was being pregnant at age 35.

Pregnancy-related death【C18】______little public attention in U.S.,【C19】______last year's worry over the flu that killed at least 28 pregnant women. Among the【C20】______preventable causes are massive bleeding, DVT-caused lung disease and uncontrolled blood pressure.

【C1】

A．as

B．for

C．once

D．since