1、________ the garden, the old man went to have a rest
A.Having been watered
B.Watering
C.Having watered
D.Being watered
2、The fire destroyed all ________ was in the building
A.who
B.what
C.that
D.which
3、The old woman, together with her two grandsons, ________ crossing the road
A.are
B.is
C.has
D.have
4、We had hardly got to the station ________ it began to rain
A.until
B.since
C.while
D.when
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