Dung dịch nào sau đây làm quỳ tím đổi thành màu xanh ?

A. Dung dịch alanin

B. Dung dịch glyxin

C. Dung dịch lysin

D. Dung dịch valin

Chất không có khả năng làm xanh nước quỳ tím là

A. Natri hiđroxit.         

B. Amoniac.     

C. Axit axetic

D. Anilin

Chất nào sau đây có khả năng làm quỳ tím ẩm hóa xanh ? 

A. Alanin

B. Anilin

C. Metylamin

D. Glyxin. 

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions

When our rent increased from $100 to $200 a month, we protested against such a tremendous increase.

A. light

B. huge

C. tiring

D. difficult

Read the following passage and choose A, B, C or D to indicate the correct word for each of the blanks

   Just as more English is being taught in primary schools worldwide, so there are a growing number of language schools in English-speaking countries that are (26) .................. courses for younger learners. In Britain most young learners' courses are (27) .................. to 11-year-olds and upwards, with a few that cater for children as young as seven. But what is a sensible age to start sending children abroad to study? (28) .................. , even adult learners find the experience of travelling to a strange country and encountering people who speak an incomprehensible language challenging?A great deal depends on how a child has been (29) .................. up. For example, if they have been exposed to new things and have already started to learn independence, then they are likely to prosper. Further on, children who have previously travelled abroad with their parents are usually more prepared for a study (30) .................. in an English-speaking country on their own than those who have not.

Điền vào ô 30

A. travel 

B. journey 

C. voyage 

D. trip

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