Cho tam giác ABC Gọi D là trung điể m BC từ D kẻ DE//AC , DF//AB a) AEDF là hình bình hành b) Chứng minh BEFC là hình thang Giúp em với ạaa, em cảm on (có vẽ hình)

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các bạn giúp mình với nhé chia động từ 1 I shouldn't drink that wine if I (be) you. ......................................................... 2 More tourists would come to this country if it (have) a better climate. ......................................................... 3 If I were sent to prison you (visit) me? ......................................................... 4 If someone (give) you a helicopter what would you do with it? . ........................................................ 5 I (buy) shares in that company if I had some money. ......................................................... 6 If I had known that you were in hospital I (visit) you. ......................................................... 7 The ground was very soft. But for that, my horse (win). ......................................................... 8 If you (arrive) ten minutes earlier you would have got a seat. ......................................................... 9 You would have seen my garden at its best if you (be) here last week. . ........................................................ 10 But for his quickness I (be) killed. ......................................................... 11 I shouldn't have believed it if I (not see) it with my own eyes. ......................................................... 12 If he had slipped he (fall) 500 meters. ......................................................... 13 If he had asked you, you (accept)? ......................................................... 14 If I (had) a map I would have been all right. ......................................................... 15 If I (know) that you were coming I'd have baked a cake. .........................................................