According to the passage, what did Carson primarily study at Johns Hopkins University?

A. oceanography

B. zoology

C. literature

D. history

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

A. coach

B. goat

C. toad

D. broad

kiểm tra 1 tiết,hk hay 15' chứ ai mà biết

a.hello

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase for each of the blanks

 One of the hottest topics on the international development agenda is how to harness the power of International Monetary Fund for the benefit of developing countries. What is sometimes called “the death of distance”, brought about by the (55)                      , allow professional services such as (56)______education and training to be provided easily and quickly to (57)                   areas. Some of the gains can be seen in countries as diverse as India and Morocco, where innovations range from (58) _________ government announcements to local craftsmen selling their wares to a (59)________market. But already a huge and expanding (60) _________ divide is opening up between developed and developing nations. The major tasks facing world leaders at present is to (61) ________ everybody on the planet with clean water, basic education and the drugs needed to fight preventable diseases. Installing a (62)______in every classroom and linking us to (63)                     must be a lesser (64)_______, for the time being at least.

Điền vào ô 56

A.  software                   

B. equipment                 

C. stationary                  

D. hardware

Hỗn hợp X gồm M₂CO₃, MHCO₃ và MCl (M là kim loại kiềm). Cho 32,65 gam X tác dụng vừa đủ với dung dịch HCl, thu được dung dịch Y và có 17,6 gam CO₂ thoát ra. Dung dịch Y tác dụng với dung dịch AgNO₃ dư, thu được 100,45 gam kết tủa. Kim loại M là

A. Li

B. Na

C. K

D. Rb

Man: “He was right!”  

Woman: “Oh, I know! I really wish I _________ his advice!”

A. took

B. had taken

C. have taken

D. would take

Những hợp chất nào sau đây có đồng phân hình học (cis-trans)?

CH₃CH=CH₂ (I); CH₃CH=CHCl (II); CH₃CH=C(CH₃)₂ (III); C₂H₅-C(CH₃)=C(CH₃)-C₂H₅ (IV); C₂H₅-C(CH₃)=CCl-CH₃ (V)

A. (I), (IV), (V)

B. (II), (IV), (V)

C. (III), (IV)

D. (II), (III), (IV), (V)

Jane agreed to help her sister with the homework ______ the slightest hesitation

A. on

B. Without

C. by

D. with