【正文】 is stress a big problem19．Yesterday little Brian asked his teacher ________.A．when did light travelled faster than soundB．how light travelled faster than soundC．why light travels faster than soundD．when light travelled faster than sound20．—Can you tell me ________ for the summer vacation?—Why not volunteer at the museum?A．what I should do B．what should I do C．when I should do D．when should I do21．I want to know more about Hong Kong. Can you tell me ________?A．when did it return to China B．when it returned to ChinaC．when does it return to China D．when it returns to China22．—I don’t know ________. Can you give me some advice?—How about Mo Yan’s? He is famous now.A．whose novel I should buy B．whose novel should I buyC．where I can buy the novel D．Where can I buy the novel23．—Summer vacation is ing! Could you tell me ________ ?—Xi’an. I really want to visit Terracotta Army.A．where are you going B．what are you doing C．where you are going D．what you are doing24．—Do you know ________—In the 1960s.A．where Havoc in Heaven was created B．when Havoc in Heaven was createdC．where was Havoc in Heaven created D．when was Havoc in Heaven created25．—Excuse me. Could you please tell me ________ change some money, please?—Of course. Walk along the street to the end and you can find a bank.A．where I can B．where can I C．where I was able to D．where was I able to26．—Could you please tell me ________ for travelling this summer?—We plan to go to the Great Wall.A．how will your family go B．how your family will goC．where your family will go D．where will your family go27．—Could you please tell me ________ tomorrow?—At 8 o’clock.A．how will she start B．how she will startC．what time she will start D．what time will she start28．—Do you know _________ at this time last night?—Sorry, I don’t know.A．what she is doing B．what she was doingC．what is she doing D．what was she doing29．—Sam, can you tell me ________?—She is a nurse.A．what Alice’s job is B．what is Alice’s jobC．what Alice’s job was D．what was Alice’s job30．—Could you tell me ________ to London?—Sure. Next month.A．when will you travel B．when would you travelC．when you will travel D．when you travel31．—Can you imagine ________ in 2035?—I’m sure it will be better.A．how our life was B．what will our life be likeC．how was our life D．what our life will be like32．—Your book is very interesting. Can you tell me ________? —In Xinhua Bookstore next to our school.A．where did you buy it B．why did you buy itC．where you bought it D．why you bought it33．—What did Mary say to you just now, Alan?—She asked ________.A．if I could go to the museum with her tomorrow B．why I am so sad todayC．who did I play volleyball with after school D．what will I do on the weekend34．—Could you tell me ________?—I’m not sure.A．how many people have joined the club B．when is Thanksgiving DayC．which animal does he like best D．what time will the dolphin show start35．—When will Mr Liu e back to Zhenjiang? —Sorry, I don’t know ________.A．how