A. a; a
B. an; a
C. an; an
D. a; an

Here's             exercise-book.

A. a
B. an
C. two
D. ×

1. 这是一本英语书。
    This is a English book.                                                      
2. 这是什么？是书包。
    What's this? It's bag.                                            
3. 那个用英语怎么说？
    What's that English?                                              
4. 这是苹果，那是梨。
    This's an apple. That's a pear.                                 
5. 那不是我的自行车。
    That not is my bike.                                               
6. 这是你的闹钟吗？不是。
    Is this your clock? No, it's no.                                 
7. 它是一辆日本小汽车。
    It's a japanese car.                                                 
8. 那是我的铅笔盒。
    That is my a pencil-box.                                           

A. brown desk
B. brown desks
C. a brown desk
D. brown a desk

A. An; an
B. An; /
C. The; the
D. A; a

A. a
B. an
C. /

Jane ______ want to be ______ officer. It's boring.

A．isn't; an
B．doesn't; a
C．doesn't; an

She lost her lovely dog in ______ accident.

A．at
B．an
C．a

This is ______ "s" and that's______ "u".

A. a, a
B. a, an
C. an, a
D. an, an

It's ______ old photo ______ my family.

A．a, at
B．an, in
C．the, of
D．an, of