Câu điều kiện 1 và 2 :
1.People don't trust him because he tells lies.
->If he.........................................
2.She is so busy that she can't come to the party
->If she ....................................
3.I haven't got the money , so I'm not going on holiday.
->If I..........................
4.He often gets bad marks because he is lazy
->If ................................................
5.Do it now,or you will not finish it on time
->If............................
6.Hurry up,or we will ba late for the exam
->If.......................................
7.Be quiet ,or you will not understand the lesson
->If................................
8.I'm not a doctor , so I can't help you
->If..........................
9.They do not understand you because you do not often talk to them
->If..............................
10.I'm so busy , so I don't write to my friends regularly
->If I....................................
11.The office may be closed, so Mark won't be able to get in
->If the office...........................
12.You can't look the word up because you haven't got a dictionary
->If.........................