Read the following three unrelated extracts from a range of sources and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 33.

Extract One:

   It is an ugly word, but "de-perimeterisation" should be jangling the nerves of the business world in ways that have nothing to do with its discordant phonetics. Essentially, it spells the end of the world as we have known it. The harbingers of this particular digital doom are email, the Internet, laptop computers, mobile phones, Blackberries, and any other way in which information, both innocuous and malicious, can enter or leave an organization unhindered by such traditional electronic defences as the firewall and the scanners for viruses and spam. The Jericho Forum set up a few years ago, is an international lobby that includes some of the big multinationals. It emphasizes the need for a proactive approach, warning: “Over the next few years, as technology and business continue to align more closely to an open, internet-driven world, the current security mechanisms that protect business information will not match the increasing demands for protection of business transactions and data.”

Rewrite the sentences below starting with the words given.
1. Air travel has become more expensive because oil prices have increased.
➝ Owing __________________________________________________________________ .
2. We got out of the building safely only because the smoke alarms went off.
➝ But for __________________________________________________________________ .
3. I'm so jealous of Julia – she is spending the weekend at a luxury health spa!
➝ I wish ___________________________________________________________________ .
4. The antique train set was worth more because it had never been played with.
➝ Had ____________________________________________________________________ .
5. The guide dog was assigned to a new master only after it had had full training. 
➝ Having __________________________________________________________________ .
6. The noise level at the party was unbearable as the children showed such enthusiasm for the games.
➝ The children were so ________________________________________________________________________ .

Câu 1: Gọi S là tập hợp các số tự nhiên gồm 3 chữ số khác nhau được thành lập từ các chữ số 1; 2; 3; 4; 6. Chọn ngẫu nhiên một số từ S, xác suất để số được chọn chia hết cho 3 là:

A. 60%                   B. 10%                  C. 40%                  D. 6,67% 

Câu 2: Tính thể tích của vật thể nằm giữa hai mặt phẳng \(x=0\) và \(x=1.\) Biết thiết diện của vật thể cắt bởi mặt phẳng \(\left(P\right)\) vuông góc với trục Ox tại điểm có hoành độ x \((0\) \(\leq\) \(x\) \(\leq\) \(1)\) là một hình chữ nhật có độ dài hai cạnh là \(x\) và \(\ln\left(x^2+1\right).\)

A. \(\ln x-1\)                 B. \(\dfrac{1}{2}\left(\ln2-1\right)\)                 C. \(\ln2-\dfrac{1}{2}\)                  D. \(\dfrac{1}{2}\ln2-1\)