Cho góc AOB và hai tia OM, ON nằm trong góc đó sao cho $ \widehat{AOM}+\widehat{BON} < \widehat{AOB}. $ Giả sử $ \widehat{AOM}={{40}^{0}};\widehat{BON}={{50}^{0}};\widehat{MON}={{30}^{0}}. $ Số đo góc $ \widehat{AOB}$  bằng
A.$ \widehat{AOB}={{100}^{0}}. $
B.$ \widehat{AOB}={{120}^{0}}. $
C.$ \widehat{AOB}={{90}^{0}}. $
D.$ \widehat{AOB}={{110}^{0}}. $

Trên cùng một nửa mặt phẳng bờ chứa tia OA, vẽ hai tia OB và OC sao cho $ \widehat{BOA}={{145}^{0}};\widehat{COA}={{55}^{0}}. $ Số đo góc BOC bằng
A.$ \widehat{BOC}={{200}^{0}}. $
B.$ \widehat{BOC}={{60}^{0}}. $
C.$ \widehat{BOC}={{90}^{0}}. $
D.$ \widehat{BOC}={{150}^{0}}. $

Choose the answer among A, B, C, D to complete each of the sentences below:
Tet is really a time of fun and _______ throughout the country.
A.celebrations
B.festivals
C.holidays
D.preparations

Choose the answer among A, B, C, D to complete each of the sentences below:
He is a great _____ of Picasso's early paintings.
A.admiration
B.admiring
C.admirer
D.admire

Choose the answer among A, B, C, D to complete each of the sentences below:
I am pleased to _______ the winner of the final competition. It's Group B
A.appoint
B.explain
C.recite
D.announce

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The most common _________ activities in my country are home based
A.practice
B.freedom
C.test
D.leisure

Choose the answer among A, B, C, D to complete each of the sentences below:
He was pulled off an extraordinary ______ in completing the voyage single-handedly.
A.feat
B.feast
C.feature
D.fervour

Choose the answer among A, B, C, D to complete each of the sentences below:
The contestants are eliminated one by one until the last _______ in a head-to-head contest.
A.sponsor
B.compete
C.enter
D.support

Cho góc bẹt $ \widehat{xOy} $ . Vẽ hai tia Om và On trên cùng thuộc một nửa mặt phẳng bờ xy sao cho $ \widehat{xOm}={{120}^{0}};\widehat{xOn}={{a}^{0}}. $ Giá trị của a để tia Om nằm giữa hai tia Oy và On là
A.$ a > 60. $
B.$ a < 120. $
C.$ a < 60. $
D.$ a > 120. $

Cho biết hai góc A và M phụ nhau; hai góc B và M bù nhau. Hãy so sánh góc A với góc B.
A. $ \widehat{A} < \widehat{B}. $
B. $ \widehat{A}=2\widehat{B}. $
C. $ \widehat{A} > \widehat{B}. $
D. $ \widehat{A}=\widehat{B}. $