Can I borrow your dictionary for a moment? Mine ________  at home.
A.is left
B.has left
C.was left
D.were left

Cho hai vectơ \(\overrightarrow a \) và \(\overrightarrow b \)vuông góc với nhau và \(\left| {\overrightarrow a } \right| = 1\), \(\left| {\overrightarrow b } \right| = \sqrt 2 \). Khẳng định đúng là
A.\(2\overrightarrow a  - \overrightarrow b \)và \(\overrightarrow a  + \overrightarrow b \) vuông góc
B.\(2\overrightarrow a  - \overrightarrow b \)và \(\overrightarrow a  + \overrightarrow b \) ngược hướng
C.\(2\overrightarrow a  - \overrightarrow b \)và \(\overrightarrow a  + \overrightarrow b \) cùng phương
D.\(2\overrightarrow a  - \overrightarrow b \)và \(\overrightarrow a  + \overrightarrow b \)cùng hướng

Dãy nào trong các dãy sau đây gồm các phân lớp electron đã bão hòa?
A.s1, p3, d7, f12.
B.s2, p6, d10, f14.
C.s2, p5, d9, f13.
D.s2, p4, d10, f10.

National Geographic is one of the most influential magazines in the world. It came into being in 1899.
A.National Geographic came into being as one of the most influential magazines in the world in 1899.
B.National Geographic, one of the most influential magazines in the world, came into being in 1899.
C.In 1899, National Geographic became one of the most influential magazines in the world.
D.National Geographic is one of the most influential magazines coming into being in 1899.

Have you decided who to talk about?
A.I see. I will talk to him.
B.Let's talk about your study.
C.I need to talk to you now
D.Not yet. I am still considering.

Exercise 1: Mark the letter A, B, C, or D indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A.beard
B.hear
C.clear
D.swear

\(A = \frac{{ - 5}}{9} \cdot \frac{3}{{11}} + \frac{{ - 13}}{{18}} \cdot \frac{3}{{11}}\)   
A.\(\frac{{ 3}}{{61}}\)
B.\(\frac{{ - 23}}{{66}}\)
C.\(\frac{{ - 25}}{{66}}\)
D.\(\frac{{ - 13}}{{66}}\)

Sam practices speaking English every day. She wants to improve her skills.
A.Sam wants to improve her skills, so that she practices speaking English every day.
B.Sam practices speaking English every day in order to improve her skills.
C.To practice speaking English, Sam wants to improve her skills every day.
D.Because Sam improves her skills, she practices speaking English every day.

Circle the word whose underlined part is pronounced differently from that of the other words.
A.repaired
B.invented
C.wounded
D.succeeded

Cho m gam hỗn hợp Na, Ba vào nước thu được dung dịch X và 6,72 lít khí. Thể tích dung dịch hỗn hợp HNO3 1M và HCl 1M để trung hòa vừa đủ dung dịch X là
A.0,4 lít.
B.0,3 lít.
C.0,1 lít.
D.0,2 lít.