Cho a,b,c là các số thực thỏa mãn  0 < a ≠ 1    v à     b c > 0.  Trong các khẳng định sau:

I .    log a b c = log a b + l o g a c

I I .    log a b c = log a b − l o g a c

I I I .    log a b c 2 = 2 log a b c

I V .    log a b 4 = 4 log a b

Có bao nhiêu khẳng định đúng

A.2

B.3

C.1

D.0

Read the text and choose the correct answer A, B, C or D for each of the gaps.

    After a tour in Cu Chi, we are moving to Mot Thoang Vietnam craft village (16) ______ at Phu Binh Village, Ho Chi Minh City. Arriving atMot Thoang Vietnam, we observe on-the-spot (17) ______craft persons weave tho cam (ethnic brocade fiber), (18) ______wooden logs into wonders and weave rattan into home appliances. Mot Thoang Vietnam can (19) ______your need to know what many of Vietnam's traditional craft villages are like. The quarter of craft villages at Mot Thoang Vietnam is quiet, but not boring (20) ______craft persons chat amidst the clacking sound of wooden cudgels hitting a chisel caused by a sculptor or a (21) ______used for weaving cloth. Sitting a little far from the sculptor and the weaver (22) ______ the craftsmen and women in their simple but unique attire making giay gio (poonah paper) and inlaid gold-leaf items, doing the (23) ______and the farming. We enjoy a traditional Vietnamese lunch at the village. After lunch, more walking to the traditional house of Vietnam from South to North with different (24) ______. Watching a traditional dance show by the (25) ______people.

Question 25:

A. ethnocentric

B. ethnically

C. ethnicity

D. ethnic