His father is      engineer. He designed such     useful machine    
#33029
A
a an
B
an a
C
an an
D
a a
推荐题目
—How do you go to ______ work?—I usually take ____bus.
#34574
A
a,a
B
the,/
C
/,a
D
the,a
The boys often play___ guitar in __afternoon.
#32139
A
the; /
B
/;the
C
the; the
D
/;/
He speaks ________ fast ________ I can’t follow him.
#32507
A
so;that
B
such;that
C
so;as to
D
enough;that