26.A spaceship flies at about eleven kilometers _______ seco

26.A spaceship flies at about eleven kilometers _______ second.
A.an B.the C.a D./
27.Betty bought three T-shirts and _____of them are red.Red is her favorite color.A.either B.both C.none D.all
28._______ fathers made them have violin lessons every day.A.John and Tom’s B.John’s and Tom’s C.John’s and Tom D.John and Tom
29._______ people are waiting to watch the raising of the national flag at Tian’anmen Square.A.Thousands B.Two thousands C.Thousand of D.Thousands of
30.Sandy used to eat fast food.But now she _____ eats them.So she is becoming much healthier.A.usually B.seldom C.often D.always
31.Look!Each of the students _________ a book silently.It’s a good way to learn language.A.are reading B.read C.is reading D.watch
32.________ supper,I usually have some rice,meat and vegetables.
A.On B.For C.Of D.In
33.He ran as fast as he could _____he failed to get there on time.
A.and B.but C.or D.so