Trong lắp đặt dây dẫn kiểu nỗi tai sao không nên luồn dây khác cấp diện  áp vào chung 1 ống và tổng tiết diện dây không được vượt quá 40% tiết diện ống.

Question 1: (A) Reading comic (B) books (C) are many (D) children’s hobby.

Your correction: ____________________

Question 2: I suggested he (A) talking about how (B) to preserve the (C) man-made wonders (D) of Vietnam.

Your correction: ____________________

Question 3: I (A)wish my younger sister (B) gets good marks (C) in this (D) semester.

Your correction: ____________________

Question 4: (A) Despite of (B) the heavy (C) snow, she went out for (D) some coffee.

Your correction: ____________________

Question 5: I (A) am tired of (B) being told all the time (C)what to do and (D) when doing this.

Your correction: ____________________

Question 6: I am (A) confident that life in the country (B) has improved (C) significant (D) in the last five years.

Your correction: ____________________

Question 7: I’ll (A) say you (B) just one more story (C) before you (D) go to sleep.

Your correction: ____________________

Question 8: People(A) are destroying (B) the air (C) by adding (D) polluted to it.

Your correction: ____________________

Giup mk với!!!!

Question 1: This vase is a beautiful piece of _______________. It's made from clay dug from our river banks.

A. handicraft                           B. lacquerware                      

  C. pottery                              D. marble sculpture

Question 2: The city life here is _________ modern and  fascinating _________ elsewhere

A. as / than                              B. more / than                      

   C. so / as                             D. better / than

Question 3: I suggest that _________ out to eat tonight.

A. we should                           B. going                                

 C. to go                       D. we went

Question 4: Viet Nam _________ decades of fighting for freedom before the country totally independent.

A. experiences                         B. has experienced                  C. experienced                        D. had experienced

Question 5: My sisiter is very clever. She is skilled at _________ cloth.

A. woven                                B. wove                                  

C. weaving                  D. weave

Question 6: He was in terrible trouble, but he didn’t know _________ the situation to his parents.

A. what is told                                    B. how to tell                         

C. when telling            D. to tell

Question 7: We went to Non Nuoc marble village to buy some souvenirs  ____________we had eaten lunch.

A. because                               B. although                          

   C. so that                     D. after

Question 8: It _________ that Ha Long Bay was recognized as a World Heritage Site by UNESCO in 1994.

A. is known                             B. knows                              

   C. knew                       D. had been known

Question 9: I failed my exam because of not trying my best.  - _________

A. ‘Stay calm. Everything will be alright.’                             B. ‘You must have been really disappointed.’           

C. ‘Well done! You did a really great job!’                                    D. ‘Go on! I know you can do it!’

Question 10: It is _________ for you _________ about your country’s history.     

A. necessary/knowing             B. necessary/know                

  C. necessary/to know  D. necessity/to know

Question 11: Children love acting _________ the stories as they tell them.     

A. down                                  B. in                                        C. for                           D. out

Question 12: She wishes she _________ find more time to do some reading every day.     

A. could                                  B. can                                     

C. may                         D. will

Question 13: Let's go outside and look ________________ the village.

A. round                                  B. up                                      

C. out                          D. over

Question 14: Bat Trang is one of the most _______________traditional craft villages of Ha Noi, right?

A. enjoy                                  B. enjoyed                              

C.  enjoying                 D. enjoyable

Question 15: The local government suggested _________ a road through the Nam Cat Tien National Park.

A. build                                   B. building                         

C. to build                   D. being built

Một ống sứ chứa 5,44 gam một hỗn hợp (Q) gồm ba chất là Fe, FeO và Fe₂O₃. Nung nóng ống ở nhiệt độ cao rồi cho một dòng khí hiđro đi qua. Dẫn khí tạo thành sau phản ứng đi qua bình đựng dung dịch axit sunfuric đặc. Sau khi phản ứng kết thúc khối lượng của bình đựng axit sunfuric tăng thêm 1,08 gam. Nếu cũng lấy 5,44 gam (Q) cho tác dụng với dung dịch axit clohiđric 1M dư thì thu được 0,672 lit khí hiđro (đktc).

1. Viết các phuơng trình hoá học.

2. Tính khối lượng mỗi chất trong hỗn hợp (Q).

3. Tính thể tích dung dịch axit HCl 1M tối thiểu để hoà tan hoàn toàn hỗn hợp (Q).