NH3是大气中唯一的碱性气态物质，对______的形成有重要影响。

-- May I see the menu, please？

-- _____.

A. This is the menu, sir

B. Yes, please go on

C. Here you are, sir

D. Of course, sir

-May I see the menu , please？ I've been waiting an hour already.

--__________.

A. That is the menu , sir

B. Here you are , sir

C. Of course , sir

A、That is the menu, sir

B、Yes, please go on

C、Here you are, sir

D、Of course, sir

Woman：May I have the menu，please？Waiter：__________．

A.Follow me，please

B.Sure．Here you are

C.Yes，the dishes are delicious

D.What’s your order

A、May I take your order now,Sir？

B、May I see the menu,please？

C、What would you like to have,Sir？

D、Do you have any special meals today？

A．Can I see the list？

B．Could I have a look at the menu,please？

C．Can I take the menu？

D．Where is the menu？

-May I see your tickets, please？

__________.

A. No, they are mine

B. No, you can’t

C. Sure

D. Yes, you can

A: May I see your passport, please？

B: __________

A、No,it's mine.

B、No,you can't.

C、Sure.

D、Yes,you can.

Customs Officer: Good morning. May I see your visa, please？

Tourist: __________

A．No problem, take it.

B．Here, you may have it.

C．Yes, give you.

D．Sure, here you are.