Each time ________ they met, they would talk long hours together.
#30161
A
which
B
when
C
during
D
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____ the temperature might drop, coal was prepared for warming.
#80035
A
To consider
B
Considered
C
Considering
D
To be considered
________ several times,but he still doesn't know how to do it correctly.
#30467
A
Although I've taught him
B
I've taught him
C
Having been taught
D
Having taught