【正文】 ，所以請求喬幫忙接電話；某一時刻正在做某事，應(yīng)為進(jìn)行時態(tài)。故選C。故選B。 ——現(xiàn)在不行，我在幫我弟弟大衛(wèi)學(xué)數(shù)學(xué)?？疾閯釉~時態(tài)。14．B【詳解】句意：——該上學(xué)了。根據(jù)問句“What’s that noise, Mike?”可知，提到的聲響是現(xiàn)有的，結(jié)合答句中“now”解析：D【詳解】句意：——邁克，那是什么聲音？——我的弟弟現(xiàn)在正在玩他的玩具汽車。她正在打掃教室?？疾楝F(xiàn)在進(jìn)行時。主語he后接be動詞is。3．D【詳解】句意：聽！這個男孩又在彈鋼琴了?？疾闀r態(tài)。s go to the cinema. There’s a new movie called Avengers IV. —Not now, I _____________ my brother David with his math.A．help B．helped C．a(chǎn)m helping D．have helped18．—Where is Frank?—He _________ to music in his room.A．listens B．is listening C．listened D．was listening19．—Hey! You nearly hit the tree! What’s up?— Sorry, I ________ the trip to my hometown.A．think about B．a(chǎn)m thinking about C．was thinking about D．thought about20．—Candy, could you please help me do the dishes?—Sorry, Mom. I ________ my homework.A．do B．did C．a(chǎn)m doing D．have done21．Don’t make any noise, Jim! Your little sister ________ now.A．sleeps B．slept C．is sleeping D．will sleep22．—Has your aunt finished writing her novel?—Not yet. She ________ it these days.A．wrote B．writes C．is writing D．will write23．Joe, answer the phone for me. I ________ how to make dumplings in the kitchen.A．learned B．a(chǎn)m learning C．have learned D．learn24．The students in our group ________ the final preparation for the match. We are sure to win.A．made B．a(chǎn)re making C．make D．will make25．You’d better not go this way. The workers _________ the road. A．have repaired B．a(chǎn)re repairing C．repaired D．will repair26．—Lucy, where is Mimi?—She ________ under the chair.A．sleeps B．slept C．is sleeping D．will sleep27．—Lily, where is our father now? Go and get him for lunch. —Just a moment, please. Father ________ a phone call in his room.A．is making B．was making C．makes D．has made28．—Look out! Something ________ down from the tree.—Dear me! It’s too dangerous.A．falls B．fell C．is falling D．was falling29．—Where is your father, Lily?—He ________ in the kitchen.A．cooked B．cooks C．will cook D．is cooking30．—Tina, let’s go out for shopping.—Sorry, Amy. I __________ my homework.A．do B．a(chǎn)m doing C．did31．—Mary, may I use your ipad for an hour?—Sorry. I ________ on it.A．work B．a(chǎn)m working C．have worked D．worked32．— Tina, the TV show has already been on. Come and watch together. — Wait a moment. I ________ coffee in the kitchen.A．a(chǎn)m making B．have made C．make D．made33．—Where’s Nick?—He ________ classes at school.A．had B．will have C．is having D．was having34．—Jane,where are you?—Dad,I________ the car in the driveway. It is really dirty.A．wash B．will wash C．a(chǎn)m washing D．was washing35．Mum ________ fish in the kitchen. It smells so good.A．cooks B．is cooking C．was cooking D．will cook36．—Maggie, could you help pick up the phone? It ________.—OK, Mum.A．rings B．rang C．will ring D．is ringing37．It’s 4 o’clock in the afternoon. Ms. Green ________ afternoon tea with her friends.A．has B．is having C．had D．was having38．My oil ________. I must go to the gas station before there is non