I study math by ____ lots of exercises.
#49928
A
did
B
doing
C
do
D
does
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He always gives me useful advice when I don’t know next .
#48456
A
how to do
B
when to do
C
what to do
D
where to do
Our teacher often asks us _____ about questions in groups.
#49159
A
discuss
B
to discuss
C
don’t
D
to talk
---Do you have any problems ______ your business?---No．thank you very much．
#50122
A
deal
B
deal with
C
dealing
D
dealing with