Our teacher said the earth ________ around the sun.
#39813
A
went
B
go
C
goes
D
is going
推荐题目
Trees and flowers ________every year to make our country more beautiful. 
#36894
A
is planted
B
was planted
C
are planted
D
were planted
While Jim ______the floor, someone ______at the door.
#40407
A
was sweeping, was knocking
B
was sweeping, knocked
C
swept ,was knocking
D
swept, knocked
Don’t make a noise! They _______on a physics problem now.
#41516
A
will work
B
are working
C
worked
D
have worked