Cho sóng ngang lan truyền trên một sợi dây đàn hồi với bước sóng λ, hai điểm P, Q trên dây có sóng truyền qua với PQ = 0,25λ.Biết sóng truyền từ P đến Q. Cho biên độ sóng bằng √3cm và biên độ không thay đổi khi sóng truyền. Nếu tại thời điểm nào đó, điểm Q có li độ √2cm thì li độ tại P có độ lớn là giúp mình với 10h là mình phải nộp r

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I/Choose A,B,C or D for each gap in the following sentences: 12.She sings the song..............(beautiful / beautifully) 14.The soccer match was very..................I enjoyed it.(exciting / excitingly) 15.She tried on the dress and it fitted her............(good / well) 16.I'm.....................I'd like something to eat.(hungry / hungrily) 17.Look!He is driving.................(slow / slowly) 22.The new computer system................next year.(is installing / will install / will be installed / installs) II/Give the correct form of the verbs: 2.There(be)...some water on the floor. 7.Now we (have)........a maths test and we (have).................an English test tomorrow 8.What you (do)...........this Sunday afternoon?-I (write)...........................an essay. 9.The children study.................English very well.They (study)..............English now.Last year Ms Huong (teach(......................them English. 10.She usually (get)....................up early,but this morning she (get).................up late because she (be) .....................tired 11.He (go)..........to the English club every Sunday,but last Sunday he (not go)...............there 24.He (want)(play)................................soccer in the afternoon. III/Use cues to make full sentences: 4.My students / good at / speak / and / write / English. ->...................................................... 8.They / know / each other / for / 3 months. ->.................................... 9.She / not visit / me / since / she / move / Ho Chi Minh city. ->...................................... 10.We / live here / since / we / born. ->.............................. 11.I / meet her / when / I / visit / her uncle. ->.................................... 12.There trees / be / water / every day. ->.................................... IV/Make questions and answer by using Why and Because: 1.We / must brush / teeth / after meals // We / want / have / healthy teeth. .............................................................. ............................................................... 2.Children / often / toothache // They eat / lot /candy. ................................................................ ................................................................ 3.He / stomachache // He / eat / too much junk food. ............................................................. ..............................................................