1. He does not eat .. A. many fishes B. too much fish C. many fish D. much fishes 2.Barbara couldnt sing or dance. .. A. So could Mary B. Mary couldnt either C. Neither did Mary D. Mary couldnt, too 3. It has rained for a week, and I .. about our barbecue tomorrow. A. will worry B. am worrying C. will be worrying D. have worried 4. I am sorry, Im late. If my phone hadnt rung at nine o' clock, I .. still in bed now. A. may be B. might have been C. might be D. may have been 5.My bother can play the guitar and .. A. I can either B. so can I C. too can I D. I cant too 6.Will you come to the party tomorrow? Ill if I .. no visitors. A. have B. had C. will have D. am having 7.These students .. so much that they feel very tired and bored. A. are made to study B. are made study C. are making to study D. ate made to be studied 8. When we arrived at the station, there were .. people with tickets in hands standing excitedly at the entrance A. so few B. so many C. so much D. so little 9.Cheating while taking exams is not .. A. accept B. accepted C. acceptance D. acceptable 10. I'd better reserve a seat today .. the train is full tomorrow. A. if B. unless C. in case D. without

1. Few people would enjoy .. A. being laughed at B. to laugh at C. laughing D. to be laughed at 2. Sue: I dont think we should exercise late at night Alice: .. A. No, I dont either B. I think so, too C. So do I D. Neither do I 3. The teacher had us .. most of the essays we .. A. to rewrite/ have written B. rewrite/ had written C. rewrite/ write D. written/ had written 4. Peter wants to look his best at the wedding, so hes .. A. having made a suit B. make a suit C. to get made a suit D. having a suit made 5. Do you like Janes new dress? Yes, I do. This is the first time I .. such a beautiful silk one. A. have seen B. see C. saw D. had seen 6. You must tell the truth. I insist on .. the truth. A. to be told B. being told C. telling D. having told 7. Education .. to be the most important element to develop a country A. often be considered B. can often considered C. can often consider D. can often be considered 8. It .. that learning a foreign language .. a lot of time. A. was said / was taken B. says / is taken C. is said / takes D. is saying / has been taken 9. Many kinds of flowers ................. to grow best in tropical weather. A. believe B. are believed C. dont believe D. seem to believe 10. Its so noisy here. Lets go somewhere else ,..................? A. do we B. wont we C. isnt it D. shall we

Chia 49.16g hỗn hợp (X) gồm phenol, glixerol, etanol thành 2 phần bằng nhau - Phần 1: tác dụng với Kali dư, thu được 6.496 lít khí (dktc) - Phần 2: hoà tan hoàn toàn 7.35 gam Cu(OH)2 Tính % khối lượng các chất trong hỗn hợp (X)

Thông qua các vấn đề dân cư – xã hội của TQ đã được học, theo em vấn đề nào được TQ đặc biệt quan tâm? Giải thích vì sao? 

Cho hình chóp S.ABCD, có đáy ABCD là hình vuông cạnh a. SA ⊥ (ABCD). SA = a

a. Chứng minh rằng: Các mặt bên của hình chóp đã cho là các tam giác vuông

b. Dựng AM ⊥ SB (M ∈ SB), AN ⊥ SD (N ∈ SD). Chứng minh rằng SC ⊥ (AMN) 

c. Gọi K là giao điểm của đường thẳng SC với (AMN). Chứng minh rằng tứ giác AMKN có các đường chéo vuông góc với nhau. Tính diện tích tứ giác đó theo a

Cho hình chóp S.ABC, có đáy ABC là tam giác vuông tại A, BC = 2a, đường cao AD = a. SA ⊥ (ABC), SA = a√2

a. Chứng minh rằng BC⊥ (SAD)

b. E,F lần lượt là trung điểm của SB,SC. Chứng minh rằng BC // (AEF) và EF ⊥ (SAD)

c. Tính diện tích tam giác SAB và SAC theo a

Chứng minh đẳng thức sau

\(\dfrac{cos^3x-cos3x}{cosx} + \dfrac{sin^3x+sin3x}{sinx} = 3\)

Chứng minh đẳng thức sau

\(4cos^4x - 2cos2x - \dfrac{1}{2}cos4x = \dfrac{3}{2}\)

Cho sin2a = \(-\dfrac{4}{5} (\dfrac{3π}{4} < a <π) \). Tính sina ， cosa