31.we have enough money to buy that motocrycle

32.she has enough free time to go to the movies with you

33.mr.bown has expercience enough to solve the proplem

34.there are enough knitting frames in the workshop for student to practice knitting

35. we haven't got enough money to go away on holiday

36.we have enough time to get to the airport on time

37.she doesn't know enough French to read a newspaper in French

38.lien doesn't have enough friends to share this work

39. there are enough books for him to stay at home to read

40.tom bought enough books for me to borrow

41. this soup is hot enough for us to eat

42.these oranges are ripe enough for you to eat

43. this morning is very cold neough for us to go swimming

44.the box is heavy enough for her to carry

45.the room was dirty enough for nobody to clean

46.it was late for her to go home

47.the class was tired enough for the teacher to explain the lesson

48 . they aren't tired enough to sleep

49.the flim was boring enough for her to see

50.she is old enough to drive a car

S= \(\dfrac{0,78}{2}\). 1500

Có hai rổ quýt chứa số quýt bằng nhau. Nếu lấy 30 quả ở rổ thứ nhất đưa sang rổ thứ hai thì số quả ở rổ thứ hai bằng 1/3 của bình phương số quả còn lại ở rổ thứ nhất. Hỏi số quả quýt ở mỗi rổ lúc ban đầu là bao nhiêu?

Hỗn hợp X gồm 4 chất hữu cơ đều có cùng công thức phân tử C₂H₈O₃N₂. Cho một lượng X phản ứng vừa đủ với V ml dung dịch NaOH 0,5M và đun nóng, thu được dung dịch Y chỉ gồm các chất vô cơ và 6,72 lít (đktc) hỗn hợp Z gồm 3 amin. Cô cạn toàn bộ dung dịch Y thu được 29,28 gam hỗn hợp muối khan. Giá trị của V là

A. 420

B. 480

C. 960.

D. 840

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

The behavior of many volcanoes__________very difficult to predict, especially the more explosive types.

A. Are

B. Is

C. That

D. Being