Beijing is_____ a fascinating city that a lot of visitors want to visit it.

---Is this ____ apple tree？

---No, it is_____ orange tree.

A.An/the

B.the/the

C.an/an D the/an

A.cheap

B.expensive

C.good

D.ok

Her homework is_____ in her class.

A. the best

B. good

C. better.

A.bottom-up

B.top--down

C.middle--approach

D.parallel--approach

A.what

B.whether

C.whenever

D.that

A.MS-DOS

B.CP/M

C.UNIX

D.all the above

A. too

B. so

C. such

D. as

A.I

B.my

C.his

D.her

A.not only ,but also

B.neither ,nor

C.either ,or

D.both ,and

A.a bad manner

B.bad manners

C.a good manner

D.good manners