The following details are true about the mothers who are most at risk EXCEPT
A. they give birth without the professionals' help.
B. they give birth at home.
C. they give birth to their first child.
D. they are young and uneducated.
When did the incident happen？
A. In last October.
B. In last December.
C. In February.
D. In last November.
Had hc worked harder, he__________the exams.
A. must have got through
B. would have got through
C. would get through
D. could get through
The __________ of the flood, which caused thousands of people to lose their houses, was 3
A. source
B. origin
C. root
D. resource
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