选出正确的答语：What's this__（）

A、Have a good day

B、It's my pen

C、Thank you

A、Yellow

B、oco

C、It's here

A、Great

B、Nicetomeetyou,too

C、I'm fine

D、No

A、when

B、what

C、with

A、What

B、When

C、Where

D、see

A、what

B、olor

C、oolr

A、what

B、how

C、good

A、when

B、what

C、with

A、whose

B、what

C、when

D、which

A、No，they aren't

B、They'er black

C、They are his pens

A、She is five

B、She is my friend

C、She is in China