There are trees ____ all shapes on the hill.
A: in
B: of
C: at
D: by
第1题
Traditionally, the father of a nuclear family earned money for the family ____ the mother cared for the house and the children.
A: when
B: while
C: as
D: for
第2题
Small molecules hold the ____ for convenient diabetes treatment.
A: profits
B: promise
C: wish
D: future
第4题
The members of an extended family are ____ by blood or by marriage.
A: related
B: relate
C: relative
D: relates
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