2. 1.It _(rain) very often here in summer. You’d better bring an umbrella with you. 2.There __(be) ten students at the picnic tomorrow. 3.My father __(has been/ has gone) to Japan several times. 4.Look! A boy __(run) after a dog. He wants to catch it. 5.I need an umbrella because it __(is raining/ rains/ was raining/ rained). 6.The rain __(stop) half an hour ago. The sky is clear now.

3. 7.I __(not see) John since he __(leave). 8.I’ve visited five countries __(so far/ until here/ just now/ two years ago). 9.The baby is crying. She __(has cried/ had been crying/ has been crying). 10.Tom __(meet) many people since he came here in June. 11.I __(live) in Taipei for two years before I moved here. 12.I asked him what he __(had done/ has done/ is doing/ does) to his hair.

4. 13.Please hurry up! We __(have been waiting/ have been waited/ are waiting/ had waited) for an hour. 14.The boy __(pick) up the money and ran away. 15.Susan really loves that film. She __(see) it eight times. 16.When you called me up last night, I __(take) a bath. 17.Please answer the telephone for me, I __(take) a bath.

5. 18.It started to rain while we __(swim) in the river. 19.As soon as I __(finish) my meal, I left the restaurant. 20.As soon as John gets there, he __(call) you.

7. 1.Kate is tired. She __(is working/ has worked/ works/ has been working) all day. 2.While his mother __(cook) in the kitchen, Tom was watching TV. 3.I lost the watch that I __(buy) the other day. 4.There __(used to be/ must be/ was used to/ might be) a church on the top of the hill, but it no longer exists. 5.I __(study) English for exactly six years this October. 6.There __(be) a lot of changes here in the last twenty years.

8. 7.This is the most beautiful island I __(have ever seen/ had never seen/ have seen/ have never seen). 8.I __(take) medicine for five days, but I still haven’t got over my cold. 9.After he locked the door, he remembered that he __(leave) the keys in his room. 10.Ben is a baseball fan. He __(has) more than one hundred pictures of famous baseball players. 11.Sam will come soon. When he __(arrive), we will tell him the news.

9. 12.By the time we arrived, the movie __(begin). 13.The old man regretted that he __(be) idle when young. 14.Jack fell ill last Sunday and __(be) in bed since then. 15.I wonder if it __(rain) tomorrow. If it __(rain), I won’t go. 16.As soon as we __(find) an apartment, we are going to move.

10. 17.Our family __(sleep) when the earthquake struck last night. 18.So far this week, we __(have) two tests and a quiz. 19.George __(ride) to school every day when he was a junior high school student. 20.I was very lucky yesterday because I met an old friend I __(not see) for a long time.