ARM D: Patients receive topotecan hydrochloride IV over 30 minutes on days 1-5 every 21 days or days 1, 8, and 15 every 28 days. Patients may also receive bevacizumab IV over 90 minutes on day 1 every 21 days or days 1 and 15 every 28 days. Courses repeat every 21 or 28 days in the absence of disease progression or unacceptable toxicity.