Câu hỏi:
The word “it” refers to
A. dental floss
B. bacteria
C. removal of plaque
Trả lời:
Thông tin: It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. (Nó cũng làm cho bề mặt của răng dễ tiếp cận hơn, tạo điều kiện cho nước bọt trung hòa axit và tái khoáng hóa các tổn thương.)
Chọn C
Câu 2:
We are having ________ terrible weather which is quite strange. Usually ______ weather in UK is not this bad.
Câu 3:
Identify the one underlined word or phrase that must be changed for the sentence to be correct
Louis Braille designed a form of communication enabling people to convey and preserve their thoughts to incorporat a series of dots which were read by the finger tips.
Câu 4:
Identify the one underlined word or phrase that must be changed for the sentence to be correct
The teacher said that (A)about 10 children need (B) special (C) help in reading. (D)
Câu 6:
We can infer from the passage that one benefit of fluoride to healthy teeth is
Câu 8:
The author of the passage states that the amount of acid produced by the bacteria in your saliva increases
