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huongdao8610
2 năm trước
Ở đậu hà lan ,tính trạng quả lục trội hoàn toàn so với tính trạng quả vàng .cho đậu quả lục thuần chủng thụ phấn với quả vàng 1. Xác định kết quả thụ phấn ở F1 và F2 2. Cho đậu F1 lai phân tích thu được kq như thế nào ? MONG BẠN GIÚP Ạ NGÀY MAI MÌNH HỌC RỒI🥺MÌNH HỨA TRẢ 5SAO Ạ
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1.In the UK, families often celebrate Christmas together, _________ they can watch each other open their presents! A.though B.but C.because D.so 2. Everyone _________ wear a helmet when riding a motorbike. It’s mandatory according to traffic law. A.isn't allowed to B.must C.can D.shouldn't 3.You _________ speak when the teacher is speaking. * A.needn't B.can't C.don't have to D.mustn't 4.You _________ place your chopsticks on your rice bowl when finished with a meal. Don’t rest them on the table. * A.shouldn't B. don't have to C.should D.mustn't 5.A tradition is something special that is __________ through the generations A.passed B.passed to C.passed down D.passed out 6.Nam has to leave to tidy his room every day. * A.Nam should leave to tidy his room every day. B.Nam must leave to tidy his room every day. C.Nam ought to leave to tidy his room every day. D.Nam need ro leave to tidy his room every day. 7.The wai is the traditional __________ of people in Thailand A.goodbye B.hello C.greeting D.greetings 8.In Vietnam, you _________ take a deep bow as you do in Japan A.mustn't B.don't have to C.should D.shouldn't 9.In Vietnam you shouldn’t use only the first name to ________ people older than you. A.speak B.talk C.say D.address 10.You look really tired. You _________ take a few days off and have a holiday. A.should B.must C.have to D.can 11.You _________ look’ at other students’ work. It’s against the rules A.shouldn't B.don't have to C.mustn't D.can't 12.He _________ a long family tradition of serving the military. * A.followed B.obliged C.reflected D.agreed 13.We have to ___________ our shoes when we go inside a pagoda. * A.take off B.give off C.turn off D. put on 14.According to the _________ in England, we have to use a knife and fork at dinner. * A.table ways B.table manners C.behaviours D.differences 15.The xoe dance is a sprititual ________ of Thai ethnic people. * A.customs B.tradition C.habit D.dance 16.Do you know the __________ way to welcome people in Tibet? * A.custom B.customer C.customary D.tradition 17. We are going to prepare _________ sticky rice served with grilled chicken for the celebration A.five colours B.five - coloirs C.five - colour D.five -coloured 18.John can’t come because he _________ work tomorrow. * A.should B.can C.must D.has to 19.You have to _________ your hat when going inside the main worship area of the temple. * A.take off B.puton C.break with D.get out 20.Sorry, but my train is at 6.00. I _________ leave now. * A.shouldn't B.ought to C.mustn't D,have to GIÚP MK VS Ạ

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