高分子化合物的毒性主要是A．单体 B．助剂 C．聚合物粉尘 D．增塑剂 E．助剂与防老剂

--Can you do it by yourself？ --I would like John______me.

A．helps

B．help

C．to help

A．How are you

B．Is there anything can I do for you

C．What do you think of it

D．What can I do for you

W: ________M: I'd like to see a pair of brown shoes.

A．What do you want？

B．What can I do for you？

C．What do you like？

D．Do you want to buy something？

A．Yes，you can give a skirt to me

B．I’d like a skirt

C．No，I can do it myself

D．I can do what I want

A．Yes, I think you can help me out.

B．No, I cannot do it for you now.

C．Yes, I'd like to try that jacket.

D．No, I don't like that jacket at all.

-________？

-I'd like to see a pair of brown shoes.

A、What do you want

B、What do you like

C、What can I do for you

D、Do you want to buy something

— Which do you prefer, coffee or tea？ —_______

A、Ok, thanks.

B、I like both.

C、Can I choose.

D、Tea, please.

W：____________

M： I’d like to see a pair of brown shoes.

A.What do you want？

B.What can I do for you？

C.What do you like？

D.Do you want to buy something？

— Can you do it by yourself？ —I would like John______me.

A．helps

B．help

C．to help

A．Yes, I think you can help me out.

B．No, I cannot do it for you now.

C．Yes, I'd like to try that jacket.

D．No, I don't like that jacket at all.