While the boy ______ down the street, the UFO _____ . 
#41890
A
was walking; was landing
B
walked; landed
C
was walking; landed
D
walked; was landing
推荐题目
Help! Tom ________ an accident.
#41602
A
will have
B
has had
C
was having
D
had had
—Where did you ______on vacation?    —I_____to Shanghai.
#40639
A
went, went.
B
go; went.
C
go;go.
D
went;go
Look! The Greens _______ in the room.
#41799
A
reads
B
were reading
C
are reading
D
read
Mr. Green          his lessons when I went into his office.
#36608
A
prepares
B
prepared
C
is preparing
D
was preparing