Các cậu có thể cho mình hỏi :Đốt cháy hoàn toàn 20,08 gam hỗn hợp X chứa C3H6, C3H4, C4H8, C4H6và H2thu được tổng khối lượng H2O và CO2là 89,84 gam. Mặt khác, nếu cho một ít bột Ni vào bình kín chứa hỗn hợp X trên rồi nung nóng một thời gian thu được hỗn hợp khí Y có tỷkhối so với H2là 20,08. Biết các chất trong X đều có mạch hở. Nếu sục toàn bộY vào dung dịch nước Br2dư thì sốmol Br2phản ứng tối đa là?

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.How often do you ............ the Internet?a. connectb. playc. surfd. watch1.How often do you............to the cinema?a. gob. seec. visitd. watch2.How often do you ............ shopping?a. buyb. doc. god. go toa. boredb. boring3. How often do you............ eggs for breakfast?a. cooksb. eatenc. haved. swallow4.How often do you ............ your teeth?a. cleanedb. brushc. polishd. whitening5.How often do you ............ aerobics?a. dob. goc. playd. dance9.How often do you ............ by train?a. driveb. goc. moved. travel13.How often do you ............ online games?a. log onb. playc. surfd. sign up17.How often do you ............ a horse?a. driveb. eatc. rided. sail7.How often do you ............ your bicycle?a. cycleb. playc. practised. ride8.How often do you ............ volleyball?a. dob. goc. playd. practise10.How often do you ............ youremail?a. checkb. log onc. replyd. send11.How often do you ............to Facebook?a. checkb. logonc. playd. sign up12.How often do you ............ for viruses?a. deleteb. detectc. scand. watch14How often do you ............ a computer?a. checkb. playc. surfd. use15.How often do you ............ fast food?a. gob. orderc. payd. eating16.How often do you ......... your grandparents?a. meetingb. sawc. visitd. wrote a letter18.How often do you ............ your shoes?a. brushb. polishc. sweepd. wash19.How often do you ............ before 6 AM?a. get upb. stay upc. stand upd. woke upd. hasn’t it?20.How often do you ............ your parents?a. argue withb. disagree forc. fight ond. go underStep 1: Complete the questions with the correct question words.Step 2: Interview a friend using your questions. Record the answers.Step 3: Tell the class some thingsabout the person you interviewed.