His parents are convinced ____ the fact the their son always focuses his mind ___ his study.
#26690
A
of; on
B
of; at
C
by; to
D
on; at
推荐题目
After her son gave his life for the country, Sally was well provided____________.
#28964
A
with
B
for
C
on
D
/
I’ll give you my telephone number ____ you might want to get in touch with me again.
#27512
A
unless
B
until
C
in case
D
since
Everyone in the village is very friendly. It doesn’t matter ____you have lived there for a short or a long time.
#26570
A
why
B
how
C
whether
D
when
_____ three influenza type A virus subtypes（子类型） have been found in pigs．
#27191
A
By far
B
As far as
C
So far
D
Till far