Cho hình chữ nhật $ ABCD $ , có diện tích $ S=20c{{m}^{2}} $ . Gọi $ M,N,P,Q $ lần lượt là các trung điểm $ AB,BC,CD,AD $ . Khi đó diện tích $ MNPQ $ bằng
A.$ 10c{{m}^{2}} $
B.$ 12c{{m}^{2}} $
C.$ 14c{{m}^{2}} $
D.$ 15c{{m}^{2}} $

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
"Your kitchen is fantastic! Did you do it all by yourself?" –"No, I ______ by a professional."
A.have it to be designed
B.had designed it
C.had it designed
D.designed it

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Dinosaurs are thought to________millions of years ago.
A.dying out
B.having died out
C.have died out
D.die out

Trong mặt phẳng ( $ \alpha $ ) cho tứ giác $ ABCD $ có các cặp cạnh đối không song song và điểm $ S\notin (\alpha ). $ $ O=AC\cap BD $ . $ I=AB\cap CD $ . Giao tuyến giữa ( $ SAD)~v\grave a ~(SBC $ ) là
A.$ SI $.
B.$ SF $ (Với $ F=AD\cap BC $ ).
C.$ \Delta $ (Với $ \Delta $ đi qua $ S v\grave a //\left( ABCD \right) $ ).
D.$ SO $.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
According to this newspaper, John is said  _______ a new record for the long jump.
A.establishing
B.established
C.to establish
D.to have established

Hai đường chéo hình thoi ABCD có độ dài là $BD=16 cm$ và $AC=12 cm$. Chu vi hình thoi bằng
A.$ 40cm $.
B.$ 60cm $.
C.$ 20cm $.
D.$ 100cm $.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Today, many serious childhood diseases ______ by early immunization.
A.prevent
B.are preventing
C.can be prevented
D.can prevent

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Her boyfriend is said _________ in the army two years ago.
A.have served
B.to serve
C.to have served
D.serving

Choose the best answer to complete the following question.
Ted ______ by a bee while he was sitting in the garden.
A.gets stung
B.got stung
C.get stung
D.got sting

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Her fiancé is said ________ from Harvard University five years ago.
A.having graduated
B.being graduated
C.to be graduated
D.to have graduated