Cho tam giác ABC có góc A = 90 độ, M là trung điểm của BC. Trên tia đối của tia MA lấy điểm D sao cho MD=MA. Cmr:

a, tam giác MAB= tam giác MDC 

b, AB//CD

c, BC = 2.AM

d, AB vuông góc với BD

\(\dfrac{x}{3}=\dfrac{y}{-2}=\dfrac{z}{4}\) và 4x + y - 2z = -18

Ba lớp 7a, 7b, 7c tham gia trồng cây. Hai lớp 7a và 7c đã trồng được 160 cây. Tính số cây mỗi lớp trồng được, biết rằng số cây của ba lớp trồng được tỉ lệ với 3, 6, 5

I. Underline the correct answer

A: I’m (1) stopping / going to stop smoking. And this time I’m not (2) starting / going to start again.
B: That’s good news. Are you (3) getting / going to get some help?
A: Oh yes. In fact, I’m (4) seeing / going to see Dr. Stevens at four o’clock today and I’m (5) doing / going
to do exactly what he tells me.
_________________________
A: Helen’s (6) coming / going to come round at seven to have dinner with us.
B: I’m not (7) being / going to be here. I’m (8) going / going to go to the theatre tonight, remember?
A: Oh no. I totally forgot. What time are you (9) coming / going to come home?

I. Underline the correct answer

A: I’m (1) stopping / going to stop smoking. And this time I’m not (2) starting / going to start again.
B: That’s good news. Are you (3) getting / going to get some help?
A: Oh yes. In fact, I’m (4) seeing / going to see Dr. Stevens at four o’clock today and I’m (5) doing / going
to do exactly what he tells me.
_________________________
A: Helen’s (6) coming / going to come round at seven to have dinner with us.
B: I’m not (7) being / going to be here. I’m (8) going / going to go to the theatre tonight, remember?
A: Oh no. I totally forgot. What time are you (9) coming / going to come home?

I. Read the situations and complete the sentences using will (‘ll) or going to.
~ The phone rings and you answer. Somebody wants to speak to John.
CALLER: Hello. Can I speak to John, please?
YOU: Just a moment. ................. I’ll get him............. (I /get)
1. It’s a nice day, so you have decided to take a walk. Just before you go, you tell your friend.
YOU: The weather’s too nice to stay in. ......................................................... a walk. (I/take)
FRIEND: Good idea! I think ............................................................................ you (I / join)
2. Your friend is worried because she has lost her driving license.
YOU: Don’t worry. I’m sure............................................................................ it (you / find)
FRIEND: I hope so.
3. There was a job advertised in the paper recently. At first you were interested, but then you decided not to
apply.
FRIEND: Have you decided what to do about that job you were interested in?
YOU: Yes............................................................................ for it. (I / not / apply)
4. You and a friend are stuck in traffic. You have to be in a meeting in five minutes and you need at least
another 20 minutes to get there.
YOU: The meeting begins in five minutes. ......................................................... (we / be late)
5. Ann and Sam are staying at a hotel. Their room is in very bad condition, especially the ceiling.
ANN: The ceiling doesn’t look very safe, does it?
SAM: No, it looks as if............................................................................... (it / fall down)
6. Paul has to go to the airport to catch a plane tomorrow morning.
PAUL:Kate, I need somebody to take me to the airport tomorrow morning.
KATE: That’s no problem .............................................. you (I / take). What time is your flight?
PAUL:10.30.
KATE: OK, ............................................. you up at your house at about 8 o’clock then. (I / pick)
Later that day, Joe offers to take Paul to the airport.
JOE: Paul, do you want me to take you to the airport?
PAUL: No thanks, Joe....................................................................... me. (Kate / take)

I. Write the sentences, putting one verb in each sentence into the past simple, and the other verb into the
past perfect.
1. When I (get) to the shop, it (close).
..................................................................................................................................................................
2. They (eat) everything by the time I (arrive) at the party.
..................................................................................................................................................................
3. When we (leave) the beach, the rain (already start).
..................................................................................................................................................................
4. I (try) telephoning her several times but she (leave the country).
..................................................................................................................................................................
5. The car (go) when I (look) into the street.
..................................................................................................................................................................