Unit 3 What were you doing when the UFO arrived?
over her head
old men sitting and talking 4.
got up and
children 2.
5.
as fast as they could
ii.vocabulary
fill in the missing letters in these words.
1.what's the weather like there? it's cold and w .
2.what was he doing? he was cooking d .
3.─let's go to a ball game t .
─sorry, i can't.i have to study this evening.
4.while the alien was visiting the museum, the boy called the tv s .
5.the boy was walking down the street when a ufo l .
iii.choose the correct answers.
（ ） 1.she said she was having a party for mary saturday.
a.on b.in c.at d.for
（ ） 2.i on the phone when a friend went into a barber's shop.
a.talked b.was talking c.talk d.is talking
（ ） 3.what about more trees to keep the air clean?
a.to plant b.plant c.planting d.planted
（ ） 4.when the ufo took , the girl was in the shop.
a.out b.off c.on d.up
（ ） 5.it will be to work out this problem in some years.
a.enough easy b.easily enough
c.easy enough d.very easily
（ ） 6.how i was at that time!