He transplanted the little tree to the garden _____ it was the best time for it.
#74197
A
where
B
when
C
that
D
until
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______ difficult the problem was, he tried his best to solve it.
#68408
A
No matter
B
Although
C
Whatever
D
However
 The astronaut did many experiments in the spaceship,            great help for knowing more about space.
#70039
A
which we think it is
B
which we think is of
C
of which we think is
D
we think which is of
 The songs _____ she sang in the concert yesterday sounded _____.
#71888
A
/ ; beautifully
B
that ; wonderfully
C
which ; well
D
/ ; nice