Đốt cháy một hỗn hợp hiđrocacbon ta thu được 2,24 lít CO2 (đktc) và 2,7 gam nước thì thể tích khí oxi đã tham gia phản ứng cháy (đktc) là
A.4,48 lít.
B.2,80 lít.
C.5,60 lít.
D.3,92 lít.

Điểm cực Bắc của nước ta nằm ở vĩ độ
A.23023'B.
B.23°24'B.
C.23°25'B.
D.23°26'B

I bought the ticket yesterday. I _________ to London tomorrow.
A.fly
B.am flying
C.flies
D.flying

A.swallow
B.subject
C.digest
D.household

According to paragraph 2, what is true about Instagram and Twitter in the stated instance?
A.They are the one and only companies providing such revolutionary services.
B.Prior to their advent, there were already several competitors in the field.
C.They were the trailblazers for the experience-oriented marketing strategy.
D.Their reputation famously preceded even the 4th Industrial Revolution.

Dòng nào sau đây đúng khi nhắc đến tác giả Nguyễn Bính.
A.Là một nhà thơ mới nhưng ông lại quay về đào sâu vào truyền thống dân gian nên đã đem đến cho thơ mình vẻ đẹp “chân quê”.
B.Ông luôn khao khát và lắng nghe sự hòa điệu giữa hồn người với tạo vật, giữa cá thể với nhân quần.
C.Thơ ông là thế giới nghệ thuật đầy xuân sắc và tình tứ, trong đó, chuẩn mực của cái đẹp không phai là thiên nhiên mà là con người.
D.Ông được mệnh danh là “người báo tin xuân” cho phong trào Thơ mới.

My friend told me, “If I were you, I would not smoke so much.”
A.My friend suggested not smoking so much.
B.My friend warned me against smoking so much.
C.My friend prohibited me from smoking so much.
D.My friend advised me not to smoke so much.

The students in my class hasn’t done their homework yet.
A.The
B.hasn’t
C.their
D.yet

He doesn’t have social skills, so he can’t cooperate with others and resolve conflicts. 
A.If he has social skills, he could cooperate with others and resolve conflicts.
B.If he had social skills, he could cooperate with others and resolve conflicts.
C.If he has social skills, he can cooperate with others and resolve conflicts.
D.If he had social skills, he can cooperate with others and resolve conflicts.

It was only because his wife helped him that he was able to finish his book.
A.If it weren’t for his wife’s help, he couldn’t have finished his book.
B.But for his wife’s help, he couldn’t finish his book.
C.Without his wife’s help, he couldn’t have finished his book.
D.If only he had been able to finish his book.