1 . Directions：Complete each sentence with the proper form of the word given in the bracket.
1. We ________(talk) in the room when the light suddenly went out.
2. —What’s that noise?—Oh, I forgot to tell you. The new machine ________(test).
3. In the past two decades, researches ________(expand) our knowledge about sleep and dream.
4. Your pen, though not very expensive, _________(write) smoothly.
5. Shortly after we ________(seat), a waiter came over to our table with a smile.

2 . Blank Filling
1. Along the way you can’t help but ________ (stop) to hike to a waterfall or take landscape shots.
2. Ignoring these mistakes may lead them ________ (suffer) the biggest disaster ever.
3. The students seemed ________ (expect) the professor to talk just like others, but the discovery that his speech was very interesting delighted them.
4. Do not have those children too young ________ (take) too much pressure.
5. Francis Chichester arrived in Australia on 12 December, and he received a warm welcome from the Australians and from his family who ________ (fly) there to meet him.
6. The ship ________ (measure) 70 meters long and 14 meters wide, with the capacity to hold 120 containers.
7. When I talked with my dad on the phone, he sounded weak, but by the time we ________ (hang) up, his voice was full of life.
8. The boss is wise enough to keep those who are able ________ (motivate) through all these rewards and punishments.

3 .
1. You should find someone ________ is more experienced to help you.
2. The book tells stories of the earthquake through the eyes of those ________ lives were influenced.
3. I like getting up very early in summer. The morning air is so good ________(breathe).
4. It is ________(extreme) useful when the user wants to know all of the results of one page.
5. It was only after he went abroad ________ he realized the importance of English.
6. In the last few years, China ________(make) great achievements in environmental protection.
7. Among all the means of transport, trains are ________ (rely), cheap and the best for long-distance journeys.
8. Rather than take a bus, I prefer ________ (walk) to school.
9. The girl used to be shy, but is ________ (gradual) getting active in group work and is more willing to express herself.
10. It’s impolite to keep others ________ (wait) for so long.

4 . Fill in the blanks in the right form with the given verbs.
1. This time last year, the bridge _________ (build).
2. To our surprise, this kind of shoes _________ (sell) well.
3. It _________ (rain) for a week; when will it stop?
4. Great changes _________ (take place) in my hometown in the past few years.
5. By the time Juan gets home, his father _________ (leave) for London.
6. This is the second time you _________ (ask) to give a lecture.
7. When Li Ming hurried home,   he found that his mother _________ (not send) to hospital yet.
8. Don’t delay! Tack _________ (wait) for you anxiously at the moment.
9. At this time tomorrow the doctor _________ (operate) on a patient.
10. I am not used to _________ (treat) like this.