mn giải bài này giúp mk vs ạ mk cần gấp 

1.Cho tam giác ABC có 3 góc nhọn , trực tâm H. Đường thẳng vuông góc với AB kẻ từ B cắt đường thẳng vuông góc với AC kẻ từ C tại D.
a) Chứng minh tứ giác BHCD là hình bình hành.
b) Gọi M là trung điểm BC, O là trung điểm AD. Chứng minh 2 OM = AH

(CẦN HÌNH THÔI NHA MN )

1) Cho tam giác abc cân tại a 2 đường trung tuyến bm cn cắt nhau tại k 

Chứng minh:

a) tam giác BNC= tam giác CMB

b) tam giác BKC cân tại K

c) MN song song B

Đánh giá công lao của Quang Trung đối với lịch sử dân tộc ?

mn giúp mk nha mk đang cần gấp 

I. Make questions for the underlined words or phrases

1. She went to school by bus yesterday

→...................................................................................................................

 2. He bought this hat at the shop over there.

→...................................................................................................................

 3. It took me three hours to finish my hmoework.

→...................................................................................................................

 4. I need a phone card to phone my parents.

→...................................................................................................................

 5. It’s about 500 km from Lai Chau to Ha Noi.

→...................................................................................................................

6. I saw her last night.

→...................................................................................................................

7. Her neighbor gave her a nice dress.

→...................................................................................................................

8. They returned to America two weeks ago.

→...................................................................................................................

9. Mrs. Robinson bought a poster.

→...................................................................................................................

10. My father was in Ha Noi last month.

→...................................................................................................................

11. He traveled to Nha Trang by train.

→...................................................................................................................

12. She went to the doctor because she was sick.

→...................................................................................................................

13. Nam left home at 7 o’clock yesterday.

→...................................................................................................................

14. He taught English in the high school.

→...................................................................................................................

15. The homework was very difficult yesterday.

→...................................................................................................................

mấy câu in đậm là từ gạch chân nha 

giúp mk đi mk đang cần gấp 

Dùng eke vẽ 3 đường cao của tam giác ABC.

Hãy cho biết ba đường cao của tam giác đó có cùng đi qua một điểm hay không. Vì sao ?

giúp mk đi mn 

Rewrite the following sentences ,unchange meaning Lop 7 ( chương trình mới ky II + key )

I. Finish each of the following sentences in such a way that it is an similar as possible in meaning to the original sentence. Use the word given and other words as necessary. Do not changer the form of the given word.

1. Mr. and Mrs. Smith are flying to Ha Noi now. TRAVELLING ______________________________________________________________________.

2. Van had a motorbike once, but he doesn’t any more. USED ______________________________________________________________________.

3. My father usually goes to work by car. DRIVES ______________________________________________________________________.

4. This part of the city didn’t have traffic jams very often. USE ______________________________________________________________________.

5. I used to walk to school when I was young. FOOT ______________________________________________________________________.

II. Combine the sentences. Use the words in brackets.

1. It was a comedy. Almost audience fell asleep. (although) _______________________________________________________________________.

2. The film was made twenty years ago. Many people have enjoyed seeing it. (however) _______________________________________________________________________. 3. She has been nominated for Best Actress five times. She has never won once. (in spite of) _______________________________________________________________________. 4. This is his first role. His acting is excellent. (nevertheless) _______________________________________________________________________. 5. The film didn’t receive good investment. The film was a great success. (despite) _______________________________________________________________________.

III. Complete the second sentence so that it has similar meaning to the first sentence.

1. In spite of having to work the next day, Tom watched films on DVD till midnight. Even though_____________________________________________________________

2. The ending of the film was quite disappoint