下列不属于窒息性气体中毒的是（)。A．一氧化碳中毒B．硫化氢中毒C．二氧化碳中毒D．苯的氨基和硝基化

--- ______？

--- I’ve never been there but I hope to go there in the future.

A. Have you been to America

B. Where are you going for holiday

C. What did you do last week

--- ____？

一I’ve never been there but I hope to go there in the future.

A.Where are you going for holiday

B.Have you been to America

C.What did you do last week

一____________？

一I’v never been there but I hope to go there in the future.

A .Where are you going for holiday

B. Have you been to America

C. What did you do last week

--- Have you been to America？

--- __________.

A. Yes. I went there last year

B. Yes. I like it very much

C. No, thank you.

I’ve already had lunch

you？Marie: Palm Springs.I've got a cousin there.A.Yes, I have been here all the timeB.Yes, I've been away on vacation.C.No, I have been here all the time.D.No, I've been away on vacation.

— Have you ever been to the Great Wall in Beijing？

—__________

A. Yes, I am .

B. No, I don’t.

C. No, I’ve never been there.

D. Certainly, I went there.

A．A.Yes, I am.

B．B.No, I don't.

C．C.No, I've never been ther

D．D.Certainly, I went ther

E．E.

re you？ Marie: Palm Springs. I've got a cousin there.

A．Yes, I have been here all the time

B．Yes, I've been away on vacation.

C．No, I have been here all the time.

D．No, I've been away on vacation.

A: You haven't been around much lately, have you？ B: ______

A．Yes. I've been to California the last month.

B．Yes. I haven't seen you for ages.

C．No. I was in a conference yesterday.

D．No. I have been away on a vacation.