北师大版现在进行时及练习一、选择题1．Ladies and gentlemen, please remain in your seats, fasten your seat belt and bring your seat back. The plane________.A．takes offB．is taking offC．has taken offD．took off2．—I haven't seen Jack for a couple of days. —He ________ for the English speaking competition which will take place next week.A．will prepareB．is preparingC．has preparedD．was preparing3．Betty can’t join us in the game. She ________ the classroom.A．has cleanedB．was cleaningC．has cleanedD．is cleaning4．Listen! The birds ________ happily in the tree outside the window.A．singB．sangC．are singingD．were singing5．—Where is John?—He is in the kitchen. He ________ the dishes now.A．will washB．is washingC．washesD．washed6．— Tom, where is your little sister?— She _______ in the backyard now.A．is playingB．will playC．playedD．plays7．—Tony, hurry up! We ________ for you now.—Just one minute.A．waitB．waitedC．have waitedD．are waiting8．— What’s that noise, Sam?— My little brother ________ his toy car.A．playedB．is playingC．playsD．was playing9．The zoo keeper is worried because the number of visitors ________ smaller and smaller.A．becomeB．are becomingC．is becomingD．have become10．—May I use your computer? —Sorry, I ________ on it.A．workB．workedC．have workedD．am working11．—What about going to the cinema? There’s a new movie called Hi, Mom.—Not now, I ________ my brother Tony with his English.A．helpB．helpedC．am helpingD．have helped12．—I can't find Mike in the classroom. Where is he?—Oh, he ________ in the library.A．was studyingB．studiedC．is studyingD．studies13．—It's time for school. Why not get on the bus?—Linda hasn't come yet. I ___________for her.A．have waitedB．am waitingC．was waitingD．waited14．—...
