【正文】 在進行時的標志，需用be doing結構；主語students復數(shù)人稱，be動詞用are，故選C。故選A?？疾闀r態(tài)?？疾楝F(xiàn)在進行時的用法。根據(jù)前面的“One moment!”可知，判斷設空處的動作“發(fā)送電子郵件”在說話時刻正在進行著，所以用現(xiàn)在進行時；現(xiàn)在進行時的構成是：主語+am/is/are+動詞的現(xiàn)在分詞；主語是He，be動詞用is，send的現(xiàn)在分詞是sending；故選A。5．A【詳解】句意：——你好！我可以和湯姆講話嗎？——等一下，他正在發(fā)電子郵件。解析：C【詳解】句意：看，許多人在公園里跳舞。4．C【詳解】句意：看，許多人在公園里跳舞?！F(xiàn)在不行，我在幫我弟弟托尼學英語。3．C【詳解】句意：——去看電影怎么樣？有部叫《嗨，媽媽》的新電影?？疾閯釉~時態(tài)。故選C。故解析：C【詳解】句意：——Candy，你能幫我洗碗嗎？——對不起，媽媽。s not at home. She___________in the library.A．read B．reads C．is reading D．was reading20．— What’s that noise, Sam?— My little brother ________ his toy car.A．played B．is playing C．plays D．was playing21．— Where is Tom?— Look! He ________with the teacher over there.A．talk B．talks C．talked D．is talking22．You had better not go this way. The workers _________ the road.A．have repaired B．a(chǎn)re repairing C．repaired D．will repair23．You’d better not go this way. The workers _________ the road. A．have repaired B．a(chǎn)re repairing C．repaired D．will repair24．— Mom, I’m busy making the bed. Can you give me a hand? — Wait a moment. I ________ the floor.A．a(chǎn)m cleaning B．will clean C．was cleaning D．have cleaned25．— Hi, Tom. I can’t find David anywhere. Do you know where he is?—Oh, he ________ for tomorrow’s exam at home.A．prepares B．is preparing C．has prepared D．prepared26．—How do you find your pany?—A little worried. We ________ ground as a leader in the field of IT with the others speeding up development.A．a(chǎn)re losing B．were losing C．lost D．have lost27．—Where’s Kelly, Mum?—She ________ a poster for the munity in her bedroom.A．makes B．will make C．made D．is making28．Be quiet. Your brother ________ classes online.A．has B．is having C．will have D．had29．—Where is your father, David?—He ________ the car in the garden.A．will wash B．washed C．is washing D．was washing30．— Tom, what’s your sister doing?— She ________ her homework in the study.A．does B．will do C．did D．is doing31．—Has your aunt finished writing her novel?—Not yet. She ________ it these days.A．wrote B．writes C．is writing D．will write32．—Where’s Nick?—He ________ classes at school.A．had B．will have C．is having D．was having33．—I can’t find David. Where is he?— He________ for tomorrow’s petition at home.A．prepares B．is preparing C．has prepared D．prepared34．— Amy, can you answer the door? I ________ the room.— I’m ing, Mum.A．clean B．cleaned C．a(chǎn)m cleaning D．have cleaned35．Many children in South Sudan ________ the trouble of hunger at the moment.A．face B．faces C．is facing D．a(chǎn)re facing36．Sorry, you can’t take the eraser away, Tony. I ________ it.A．have used B．used C．was using D．a(chǎn)m using37．—Maggie, could you help pick up the phone? It ________.—OK, Mum.A．rings B．rang C．will ring D．is ringing38．—Tom, where is your father?—He ________ my bike.A．is repairing B．repairs C．has repaired D．will repair39．It’s 4 o’clock in the afternoon. Ms. Green ________ afternoon tea with her friends.A．has B．is having C．had D．was h