1、A单句填空1Where is Peter? I cant find him anywhere.He went to the library after breakfast and_ (write) his essay there ever since.答案has been writing句意：彼特在哪？我哪也找不到他。早饭后他去了图书馆，从那以后他一直在那写论文。根据句中的时间状语ever since可知，write 这一动作从过去某一时刻一直持续到现在，故用现在完成进行时has been writing。2At college, Barack Obama didnt know that he
2、_(become) the first black president of the United States of America.答案was to become句意：在上大学时，巴拉克奥巴马不知道他将成为美国第一位黑人总统。根据句意可知，“上大学”发生在过去，从过去的时间看将来，要用过去将来时，故用was to become。3The reports went missing in 2012 and nobody _(see) them since.答案has seen句意：这些报告在2012年就丢失了，此后再也没人见到过它们。由题干中的since可知，本题应用现在完成时。4Hi, le
3、ts go skating.Sorry, Im busy right now. I _(fill) in an application form for a new job.答案am filling句意：嗨！让我们去滑冰吧！很抱歉，我现在很忙。我正在填申请新工作的表。此处表示正在进行的动作，故用现在进行时。5She _(phone) someone, so I nodded to her and went away.答案was phoning句意：她当时正在给别人打电话，因此我朝她点了一下头就走开了。根据句意可知，此处表示“当时她正在打电话”，所以用过去进行时。6Sunny Taxi Serv
4、ice. Can I help you ?My plane_(take) off at 11：30 in the morning. Can you send a taxi no later than 9 oclock?答案takes句意：阳光出租车服务。我能帮您吗？我要乘坐的航班上午11：30起飞，你能在9点前派一辆出租车吗？介绍飞机、火车等公共交通工具的时刻表常用一般现在时。7Jack doesnt smoke now, but he _(smoke) for almost twenty years.答案smoked句意：杰克现在不抽烟了，但他(曾经)抽了近20年。题干中有延续性的时间状语f
5、or almost twenty years，表示的是与现在无关的过去动作，应该用一般过去时。8I_(drink) a cup of coffee when a new idea occurred to me.答案was drinking句意：我正在喝咖啡时突然想出来一个好主意。从occurred可知主句表示过去的动作正在进行，故用过去进行时。9Im afraid I cant recognize Ann when we meet, for I _(see) her for 30 years.答案have not seen句意：恐怕当我们相见时我都认不出Ann了，因为我30年没见她了。此处指从
6、过去到现在已经30年了，故用现在完成时。10In order to make up the missing notes, he _(try) his best to spend as much spare time as possible doing this job these days.答案has been trying句意：为了补丢失的笔记，他这些天一直在努力用尽可能多的业余时间做这项工作。根据句意及these days可知，此处强调从过去某个时间开始到现在一直在做的事情，因此用现在完成进行时。B单句改错1In the last few years, China made great a
7、chievements in environmental protection._答案made前加has根据时间状语in the last few years用现在完成时。2Dr Jackson is not in his office at the moment.All right. I call him later._答案call前加will表示“临时决定”。3Is Peter coming?No, he had changed his mind after a phone call at the last minute._答案去掉had根据语境可知，改变主意发生在过去某一时间，故用一般过
8、去时。4What time is it?I have no idea. But just a minute, I check it for you._答案check前加will表示接下来要发生的动作。5The twins, who finished their homework, were allowed to play badminton on the playground._答案finished前加had“完成家庭作业”发生在“被允许打羽毛球之前”是“过去的过去”，故用过去完成时。6The Russian rocket designer has died. For many years,
9、he had served as a deputy to the father of the Soviet space program._答案去掉had由语境可知，当助手应该为过去的事，故用一般过去时。7Have you got the sleeping bag needed for the camping this weekend?Yes, I have bought it almost the moment I heard the news._答案去掉have此处应与heard保持一致，故用过去时。8Do you still remember the name of the company
10、?Im really sorry. The name escaped from my mind._答案escaped前加has根据语境可知，此处指过去的动作对现在的影响，故用现在完成时。9How is your grandma recently?She feels quite good after the operation, but her health has taken a turn for the worse._答案feelsfelt此处说的是过去的事情，故用一般过去时。10Can I help you, madam?No, thank you. I wait for my order._答案waitam waiting根据上下文语境可知答话者正在等待，故用现在进行时。