A.Muối tập trung trong tế bào rễ làm vỡ tế bào.
B.Do tinh thể muối hình thành trong khí khổng.
C.Các ion Na+ và Cl- gây đầu độc tế bào.
D.Thế nước của đất quá thấp.

A.1-a; 2-c; 3-b; 4-d
B.1-b; 2-a; 3-d; 4-c
C.1-b; 2-d; 3-a; 4-b
D.1-c; 2-a; 3-b; 4-a.

A.cách li tập tính.
B.cách li sinh thái.
C.cách li thời gian.
D.cách li địa lí.

A.the market
B.the sale
C.business
D.the goal

A.can't she
B.wasn’t she
C.can she
D.was she

A.can't she
B.wasn’t she
C.can she
D.was she

A.Both overeating and physical inactivity result from several deadly diseases.
B.Apart from physical activities, eating too much also contributes to several deadly diseases.
C.Not only overeating but also physical inactivity may lead to several deadly diseases.
D.Overeating and physical inactivity are caused by several deadly diseases.

A.My sister wishes that she applied for the job in the summer.
B.My sister feels regret because she had applied for the job in the summer.
C.If only my sister didn't apply for the job in the summer.
D.My sister wishes that she had applied for the job in the summer.

A.My sister wishes that she applied for the job in the summer.
B.My sister feels regret because she had applied for the job in the summer.
C.If only my sister didn't apply for the job in the summer.
D.My sister wishes that she had applied for the job in the summer.

A.You mightn't book tickets for the flight in advance.
B.You mustn't book tickets for the flight in advance.
C.You needn't book tickets for the flight in advance.
D.You shouldn't book tickets for the flight in advance.