Lily is so smart in her class．She usually spends the_____time and makes the_____mistakes in her homework．
A．least,leastB．fewest,least
C．fewest,fewestD．least,fewest
If_____litters, our world will be more beautiful．
A．everyoneB．someone
C．anyoneD．no one
—Can the plane fly _____ the Atlantic Ocean?
—Yes,but it needs to go_____the clouds for hours．
A．across,throughB．through, across
C．across,acrossD．through, through
—Can you tell me _____when the teacher came into the classroom?
—Sorry,I don’t know．
A．what were the students doing
B．what are the students doing
C．what the students were doing
D．what the students are doing
The teacher said that _____ of the boys would take part in the fashion show．
A．two thirdB．three fives
C．three quartersD．three fifth
—______ did your sister leave China?
—She______ for three years ．
A．When, has leftB．When ,has been away
C．How long,has leftD．How long,has been away
