English is ________ useful language so that most people speak it as ________ second language.
#33642
A
a; the
B
an; the
C
an; a
D
a; a
推荐题目
Li Na plays __________ tennis very well. She has become __________ first Asian woman toreach a Grand Slam（大满贯）final.
#32226
A
a, the
B
/ , the
C
the, a
D
/ , a
____ educational CD-ROM has just come out. _____ CD-ROM is called ‘Dora Explorer’.
#34060
A
A ; The
B
An ;The
C
The ; The
D
The ;A
_____ORBIS doctor who got here yesterday needed _______ X-ray machine to examine his patients.
#34153
A
The; a
B
The; an
C
An; a
D
An; an
Our teacher suggests us that watching TV at _______ most _______ hour a day during the winter holiday.
#33400
A
the; a
B
a; an
C
不填; a
D
不填; an