–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
推荐题目
He went into space as _____polit of Gemini 8. 
#32717
A
the Command
B
a Command
C
Command
D
Command
 ______ English is ______ useful language.
#32110
A
A , an
B
/ , a
C
The , an
D
/ , an
—_____ do you go to the zoo with your brother?—Three times a month.
#32758
A
How long
B
How often
C
How old
D
How much