The flowers were so beautiful that we took a photograph of them.

He wasn't experienced enough to get the job.

2. doing

3. talk

4. climbing

1.Have you answered the question?
2.Has Jenny locked the door?
3.Has Walter called us?
4.Have you seen the picture?
5.Have your parents got the letter?
6.Has it rained a lot?
7.How often have we sung the song?
8.Has Maureen watched the film?
9.How many books has Bob read?
10.Have you ever been to London?

IV. Combine these two sentences using “TOO/ ENOUGH”.
1. We couldn’t eat the food. It was very hot.
→ The food was too hot for us to eat.
2. A taxi would have been best. But I didn’t have much money.
→ I didn't have enough money to take a taxi.
3. She can’t take a day off. She’s very busy.
→ She is too busy to take a day off.
4. A picnic would be nice. But it’s wet.
→ It is not dry enough to go for a picnic
5. Nobody could move the piano. It was very heavy.
→ The piano was too heavy to move.

1. Lỗi sai: build

Sửa: bulit

Giải thích: Cấu trúc bị động thì hiện tại tiếp diễn: S + am/ is/are +  being + V3 (+ by Sb/O)

2. Lỗi sai: were

Sửa: was

Giải thích: chủ ngữ số ít nên động từ theo sau phải chia theo chủ ngữ

lỗi sai: posters

sửa: poster

Giải thích: That dùng để nói rõ, chỉ rõ MỘT người, MỘT vật ở xa người nói. Hơn nữa, trước posters có "a" nên danh từ theo sau bắt buộc phải là danh từ số ít.

a) Xét △ABC vuông tại A (do góc A = \(90^o\)) có \(AB^2 + AC^2 = BC^2\) (định lý Pitago)

                                                                    mà \(AB = 6cm; AC = 8cm\)

                                                                    → \(6^2 + 8^2 = BC^2\)

                                                                    → \(BC = \) \(\sqrt{36+64}\)

                                                                    → \(BC = 10 (cm)\)

b) Xét △ABC có AB<AC<BC (do 6<8<10)

nên góc ACB < góc ABC < góc BAC

c) đề bài sai hay gì á chứ chưa cho điểm N mà bắt so sánh rồi 

1. Close the door.

2. Listen to the teacher.

3. Don't be late for class.

4. Don't send text messages in class.

5. Don't take to other students in an exam.

1. Where do they live?

2. When did you begin to study English?

3. How much does it cost to built a plant of solar panels in the desert?

4. How long does it take you to search for this kind of information on the Internet?

5. Have you been to any famous school in England?