khi  thực hiện đoạn chương trình sau

n:=1; t:=50;

while n>20 do begin

n:=n+5 t:=t-n; end; 

hãy cho biết gt của biến t bằng bao nhiêu?

Trình bày những nét chính về nguyên nhân, diễn biến và kết quả của phong trào cần Vương cuối thế kỉ XIX?

tại sao hiện tượng đông máu rất nguy hiểm đến tính mạng của người bệnh?

A

1. They ................. students yesterday.

see  B. saw C . had seen D. have saw

2. They ............ doctors two years ago.

meet B. did meet C. met D. had met

3. They ............... farmers last month.

are  B .Were C. was D. had been

4. We ..... nurses yesterday.

   A.are b. is c. was d. Were

5. The weather ....... cold yesterday.

   A.aren’t b. isn’t c. wasn’t d. weren’t

6. I .........a pupil last week.

 A.aren’t b. isn’t c. wasn’t d. weren’t

7. These hats ....new yesterday.

 A.aren’t b. isn’t c. wasn’t d. weren’t

8. My parents.....teachers two years ago.

A.are b. is c. was d. Were

9. He .............a mechanic last Monday.

A.aren’t b. is c. wasn’t d. weren’t

10. …. he an engineer yesterday. No, he .....

A.is/ isn’t   b.are/aren’t   c.was/wasn’t d.were/weren’t

11. .......It hot last week?

A. am b. is c. was d. Were

12. The shops ….open last Monday.

A. am b. is c. was d. Were

13. .... you a teacher two years ago? Yes, I.....

a.is/ isn’t b.are/aren’t c.were/wasn’t d.was/weren’t (câu này chịu )

14. Where ......Nam from yesterday?

A. am b. is c. was d. Were

15. Why .........they unhappy last Tuesday?

A. am b. is c. was d. Were

16. I ….. your trip to Nha Trang two years ago.

A.remember b.remembers c.remembered

17. Ba ........ the cap all day yesterday.

A. wear b. wears c. weared d. wore

18. We ..........a lot of fish yesterday.

A. eated b. ate c. eats d. Eat

19. Her aunt ........ her to see Cham Temple last year.

A .taked b. took c. take d. Takes

20. Tuan ......... a new bike yesterday.

A. haved b. has c. had d. Have film last night.

b

b

Nguyên nhân quan trọng nhất làm cho nền công nghiệp Chủ Nghĩa Đế Quốc Mĩ phát triển là do đâu ?

 

lộn, tính cách của mai là gì, thì mới đúng