1.   Tomatoes               before they are completely ripe.

      A. can be picked         B. can pick                      C. needn’t pick             D. should be picking

2.   It                 that the road through the national park will not affect the environment and living habitat of wild animals there.

      A. has thought            B. had been thought   C. is thought                      D. thinks

3.   The refreshments              By Karen.

      A. are going to be prepared                                 B. are going to prepare

      C. are preparing                                                   D. are to prepare

4. Trang An Landscape Complex is renowned for its diverse ecosystem, unique natural beauty                 and characteristics.

      A. environmental        B. ecological                    C. geology                   D. geological

5.   Is that70 tons of dead fish washed ashore along more than 200 kilometres of Viet Nam’s central coastline in early April.

      A. was reported                                                    B. had reported

      C. had been reported                                           D. were reported

6.   The key somewhere.

      A. must have been leaving                                   B. must have left

      C. must be leaving                                               D. must have been left

7.   The Ho Dynasty Citadel has a palace                               with marble roads that connect each palace.

      A. complex                  B. building                  C. area                               D. setting

8.   It                that the Perfume Pagoda is located in the interior of a cave to the top of the Huong Tich mountains.

      A. is spoken                B. is told                     C. says                              D. is said

9.   Japanese                at the meeting.

      A. will speak               B. will spoken             C. will be spoken              D. will be speaking

10. The towers of the My Son sanctuary are the most significant                of the My Son civilization.

      A. apartments              B. plans                       C. structures                      D. arrangements

11. Ha Noi’s four sacred temples, the                       of Ha Noi were built to defend the four directions (East, West, South, North) of the ancient Thang Long capital city.

      A. communication       B. feelings                   C. energy                          D. spirits

12. Portuguese           as an official language in this city since three hundred years ago.

      A. has always been spoken                             B. has been spoken always

      C. has always spoken                                      D. had always spoken

13. The Thang Long Imperial Citadel was the                       of political power for nearly seven centuries without interruption.

      A. system                    B. centre                      C. middle                          D. point

14.                   in simpler words?

      A. Has this issue expressed                            C. Cannot issue express

      C. Can this issue express                                D. Could not this issue be expressed

15. All traffic laws                 .

      A. is observed                                                 B. must be observed

      C. must have observed                                   D. had better observe

5.   A. refreshment                  B. sculpture                 C. exciting                   D. intention

6.   A. lacquerware                  B. drumhead               C. sculpture                 D. artisan

7.   A. authentic                      B. craftsman                C. workshop                D. layer

8.   A. embroider                     B. preserve                  C. artifact                    D. initial

9.   A. flyover                          B. skytrain                   C. underpass               D. misbehave

10. A. tolerant                        B. minority                  C. equipment               D. assignment

11. A. affordable                   B. indicator                 C. achievement           D. importance

12. A. adolescence                 B. cognitive                 C. concentrate             D. comfortable

13. A. emergency                   B. frustrated                C. independence         D. decision

14. A. fabulous                      B. reliable                   C. variety                    D. spectacular

15. A. picturesque                  B. metropolitan           C. independence         D. adulthood

giải giúp e câu 5

6.   Mr. Buong is admired. He dedicates all his life to protecting environment. (since)

      .................................................................................................................

7.   Give me a ring. You’ll hear some news. (when)

      .................................................................................................................

8.   The TV program will end. I’ll do my homework. (after)

      .................................................................................................................

9.   I’ll go to work. I’ll have a bath. (before)

      .................................................................................................................

10. She’ll in Paris. She’ll visit friends. (while)

      .................................................................................................................

Để ước tính tốc độ s (dặm/giờ) của một chiếc xe, cảnh sát sử dụng công th s fd  30 , với d (tính bằng feet) là độ dài vết trượt của bánh xe và f là hệ số ma sát. Nếu xe chạy với tốc độ 50 km/giờ trên đoạn đường có hệ số ma sát là 0,60 thì khi thắng lại vết trượt trên đường dài bao nhiêu feet? (Biết 1 dặm = 1,61 km, kết quả chính xác tới 0,01)

Bài 1. Viết công thức hóa học tạo bởi các thành phần tương ứng vào ô trống

 Phân loại các công thức mới viết trong bảng trên(basic oxide , muối ,base)

Bài 2. Viết công thức hóa học tạo bởi các thành phần tương ứng vào ô trống

Các công thức mới viết thuộc loại hợp chất nào?