Cho dãy số (un) với un=(-1)n+1n+1.
Khẳng định sai là
A. Số hạng thứ  9 của dãy 110.
B. Số hạng thứ 10 của dãy: 111.
C. Đây là một dãy số giảm.
D. Bị chặn trên bởi số M = 1.

Choose one sentence that has the same meaning as the root one:
London has dealt with the problems of pollution.
A. London has always been clean.
B. London is full of pollution.
C. London used to be dirty, but is clean now.
D. London was polluted but it is clean now.

Cho dãy số u1=1un+1=un+(-1)2nSố hạng tổng quát của dãy số trên là
A. un=1+n.
B. un=1-n.
C. un=1+(-1)2n.
D. un=n.

Cho dãy số un=2n. Số hạng un+1 bằng :
A. 2n.2.
B. 2n+1.
C. 2(n+1).
D. 2n+2.

Choose the word that has the underlined part pronounced differently from the rest:
find                  bite               since              drive
A. find                  
B. bite              
C.  since              
D. drive

Choose the correct sentence which is built from the words and phrases given:
Mary / tell / me / give / her / my / phone / number / .
A. Mary told me give her my phone number.
B. Mary told me giving her my phone number.
C. Mary told me to give her my phone number.
D. Mary told me given her my phone number.

Find a mistake in the four underlined parts of the sentence and correct it:
The beach on where we used to lie for sunbathing is very nice and clean.
A. where
B. to lie
C. sunbathing
D. is

Find a mistake in the four underlined parts of the sentence and correct it:
Nothing can prevent him from loving her, can’t it?
A. prevent
B. from
C. loving
D. can’t it

Choose a word that has different stress pattern:
include               cultude              country                  venue
A. include               
B. cultude              
C. country                  
D. venue

Choose the correct sentence which is built from the words and phrases given:
Europe's 710 million people / 11% of the world's population
A. Europe's 710 million people make up 11% of the world's population.
B. Europe's 710 million people who are 11% of the world's population.
C. Europe's 710 million people are 11% of the world's population
D. Europe's 710 million people they consist of 11% of the world's population