I was reading attentively in my own room ________ suddenly he knocked at the door.
#33711
A
when
B
while
C
then
D
as
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We have decided to fulfill the task in time, difficulties we may meet with.
#32510
A
no matter how
B
however
C
whatever
D
whichever
____ the temperature might drop, coal was prepared for warming.
#80035
A
To consider
B
Considered
C
Considering
D
To be considered
Jack said that he was sure of succeeding in passing the Totel Examination this time, _______, in my opinion, I don’t think so.
#80088
A
what
B
which
C
but
D
therefore
________ 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