(2013·辽宁六校高三联考)After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.
#89281
A
provided; sit
B
providing; sitting
C
providing; sat
D
provided; sat
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 Please tell me the way you thought of ___ the garden. 
#98052
A
take care of
B
to take care of
C
taking care of
D
how to take care of
 ________ all the homework assigned by the school, the students have to work at it till midnight.
#88763
A
Completing
B
To complete
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Having completed
D
To have completed