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
Rush Hour is______ action movie, and_______ story（故事） happened（发生） in America.
#33670
A
a, the
B
the, a
C
an, a
D
an, the
Perhaps we will live in _________ dome on Mars.
#32718
A
a 8-bedrooms
B
an 8-bedrooms
C
a 8-bedroom
D
an 8-bedroom
–It’s hard work to achieve a balance between schoolwork and hobbies.–So it is, but we have to.
#32388
A
a
B
an
C
the
D
不填
In the United States, Thanksgiving Day is on ____fourth Thursday in_____ November.
#32598
A
the; 不填
B
the; a
C
不填; the
D
a; 不填