Cho đường tròn (O) có 2 đường kính AC và BD vuông góc với nhau. Một điểm M bất kì trên cung nhỏ AB, đường thẳng DM cắt AC ở E và cắt đường thẳng BC ở F. Chứng minh: FE.MD=FC.AD Các bạn ơi giúp mình với mình phải nộp gấp

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1) I (do)__________it for you tomorrow. 2) My father (call)_____________you in 5 minutes. 3) We believe that she (recover)_______________from her illness soon. 4) I promise I (return)______________to school next week. 5) If it rains, he (stay)____________at home. 6) You (take) me to the zoo next weekend? 7) I think he (not come)_______________back his hometown tomorrow. 8) She (spend) ____ all her money last week. 9) Mum (not spend) ___________ any money on herself. 10) I (lend) __________ my penknife to someone, but I can't remember who it was now. 11) John and his father (build) ___________ the cabin themselves last year. 12) My parents (sell) ____________ the stereo at a garage sale. 13) ___________You (tell) ___________ anyone about this yesterday? 14) She (tear) ___________ the letter to pieces and threw it in the bin. 15) 11. Yesterday Clouds (creep) ___________ across the horizon, just above the line of trees. 16) . He .....................to the zoo last Sunday (go) 17) She (not/ watch)....................................TV last night 18) They (meet)..............................their friends at the movie theater last week 19) What...............you (do).....................last night 20) . ........................... they (buy).....................a new car two days ago? 21) . We .............. (have) a lot of homework yesterday 22) . My mom always ................................delicious meals. (make) 23) Charlie…………………………..eggs. (not eat) 24) .Susie………………………….shopping every week. (go) 25) ................................ Minh and Hoa ................................ to work by bus every day? (go) 26) . Where……………………..he………………………from? (come) 27) Jimmy ................................. usually ................................ the trees. (not water) 28) They ................................ out once a month. (eat) 29) Be careful! The car (go) ………………….. so fast. 30) Listen! Someone (cry) ………………….. in the next room. 31) Your brother (sit) ………………….. next to the beautiful girl over there at present? 32) Now they (try) ………………….. to pass the examination. 33) It’s 12 o’clock, and my parents (cook) ………………….. lunch in the kitchen. 34) Keep silent! You (talk) ………………….. so loudly. 35) I (not stay) ………………….. at home at the moment. 36) Now she (lie) ………………….. to her mother about her bad marks. 37) At present they (travel) ………………….. to New York. 38) He (not work) ………………….. in his office now. 39) My parents ___________ (drive) to work now. 40) What ___________ the boys ___________ (do) now?