He has a good command ________ maths and plays an important part ________ our team.
#12329
A
about; in
B
of; to
C
to; about
D
of; in
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Sorry, dear. It’s my _____to have you take tablets by ____.
#12739
A
mistake; error
B
fault; mistake
C
error; fault
D
fault; error
All those second-hand goods are sold at                  before.
#14068
A
30%as lower price as
B
30%as low a price as
C
as 30%low price as
D
30%lower price than