Chọn đáp án đúng nhất để hoàn thành các câu sau: ( câu điều kiện)
   1. Mr Smith has to work on weekends if his manager ................... him to.
   a. tell                            b. telling 
   c. told                           d. tells
   2. Unless they ......................... her to work hard, she would not. 
   a. encourage                b. encourage
   c. encourages              d. encouraging
   3. If I  ............. a king, I would give money to the poor.
   a. is                                 b. are 
   c. am                              d. were 
   4. If we had left this country, we would have  ................ to Australia.
   a. emigrated                     b. emigrates
   c. emigrate                       d. emigrating
   5. If I had to the party last night, I ...................... her.
   a.  will have met                b. would meet
   c. would have met            d. will meet ​
   6. Unless the pupils pay attention, the teacher ............ be angry.
  a. would                               b.may
  c. will                                    d. might
  7. Please do not go out if it  ................
  a. rain                                   b. rains
  c. rained                               d. raining