People who travel long distances on trains often fall asleep. =>

1/The girl is crazy. I have just made friends with her. => The girl..................... 2/You must come to see the workers. I am interested in them. => You must come...................

1)She's won a prestigious singing ................... 2)He is expected to .................... for the title of world champion next year. 3)The youngest ...................... in this event is the boy who is over there. 4)There are six remaining ..................... for the grand prize of $50000. 5)She .................. priced goods. 6)He won fourth place in the ....................

1)She never ................ in any of our discussions, does she? 2)A back injury prevented active ............... in any sports for a while. 3)Kate has always ............. fully in the life of the school.

1)These sports are exciting for .............. and spectators a like. 2)................ ranged in age from 35 to 55. 3)She didn't ................ in the discussion. 4)We encourage students to ............... fully in the running of the college. 5)Those who declined ............... were excused and sent back to the classroom.

Tiến hành lên men hoàn toàn 108 gam glucozơ thành ancol etylic thì có V lít khí CO2 (ở đktc) thoát ra. Giá trị của V là bao nhiêu? (C=12, H=1, O=16)

Viết phương trình phản ứng khi: a) CH3CHO+O2 b) CH3OH+CO c) Etylen+H2O

Cho hình chóp SABCD có đáy là hình vuông cạnh = a. SA vuông góc với (ABCD), SA=a. a)Chứng minh BC vuông góc với (SAB)? b)Gọi K là chân đường cao hạ từ A lên SD. Chứng minh (AKC) vuông góc với (SDC)?

Cho các chất sau: C3H7COOH, CH3COOH, C2H5COOH. Hãy sắp xếp theo chiều nhiệt độ sôi tăng dần từ trái sang phải.

1/I......(go) fishing with my brother when I was 8. 2/My brother.........(go) to the market at 7 a.m yesterday. 3/She.......(dance) while I.........(sing). 4/Yesterday, I.........(get) up at 6 and (have) .......... breakfast at 6.30. 5/He (be)......... at his computer for seven hours. 6/She (not/have).............. any fun for a long time. 7/My father (not/play)............ any sport since last year.