围产期指：
A．母亲怀孕～小儿出生
B．母亲怀孕～小儿出生后7天
C．孕期4周～小儿出生
D．孕期28周～小儿出生
E．孕期28周～生后7天
参考答案：E
my father is usually _____ home _____ Sundays. [ ]
A. in, in
B. at, at
C. / , in
D. at, on
