Điền số thích hợp vào ô trống
Số trung bình cộng của 14;; 25; 31 là:
(14 + 18 + 25 + 31) : 4 =
A.18
B.22
C.
D.

Để tính trung bình cộng của ba số x; y; z. Ta tính:
A.(x + y + z) : 3
B.(x + y + z) : 2
C.(x + z) : 2 + y
D.(x + y) : 2 + z

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Please remember to take back to the library all the books ………… are due this week.
 
A.when
B.where
C.whose
D.that

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
 
Deserts are harsh and dry, ________ many plants grow there.
A.nor
B.for
C.yet
D.so

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
 She owned a car, ______ she didn't know how to drive it.
 
A.nor
B.as
C.and
D.yet

Cho $ \Delta ABC=\Delta MNP $ , biết $ \widehat{A}={{60}^{0}}\,;\,\widehat{P}={{30}^{0}} $ . Khi đó tam giác ABC là:
A.Tam giác nhọn.
B.Tam giác tù.
C.Tam giác vuông tại B.
D.Tam giác vuông tại C.

Cho $ \Delta EFM=\Delta KPN $ và $ \widehat{E}=\widehat{K}={{90}^{o}} $ . Khi đó, tỉ số diện tích của tam giác EFM và diện tích tam giác KPN bằng:
A. $ \dfrac{1}{2} $ .
B. $ 1 $ .
C. $ 2 $ .
D. $ \dfrac{1}{3} $ .

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
__________ it was already dark, they went on working in the fields.
A.But
B.Whether
C.If
D.Though

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Humans can't see or smell noise pollution,_________ it still affects the environment.
 
A.‘yet’ and ‘but’ are correct
B.yet
C.either
D.but

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
We stayed at the Royal Hotel, ________ Peter recommended to us.
A.that
B.which
C.whom
D.where