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【多选题】
肝炎病毒有哪几种？A.
甲型
B.
C.
丙型
D.
E.
戊型
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举一反三
【单选题】It was a long time ______ the neighbors found that the old lady had been dead of cold.
A.
when
B.
until
C.
since
D.
before
【简答题】While she was going downstairs, the old lady had her leg (break)______.
【单选题】The old lady had expected to see all her relatives when she was ill in hospital, but none came to see her ______ many of her neighbors offered their help．
A.
when
B.
as
C.
because
D.
while
【简答题】Seeing that the old lady had no chair ___, the boy offered her his own. A, to sit B to be seated C. to seat herself D. to sit on
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