This area has been free from Foot-and-Mouth Disease( )two years.

查看本题答案

包含此试题的试卷

keep free from make it free from to be made free with be kept free from

has gone is going has been went

is declining has been declined had declined has been declining

for in after before

It has been decided…be given It has decided…be given That has been decided…be given It has been decided… give

has exported has been exported were exported have been exported

was put in; was set free 　 was shut into, is set free 　 put into, has been set freely 　 was put into; has been set free

keep free from make it free from to be made free with be kept free from

was put in prison was in prison has been put in prison has been in prison

can will may shall

for in after before

had been visited has been visited was visited is visited

is being polluted are being polluted has been polluted have been polluted

in on at with

it been declared; have been set free it declared; have been set free they declared; has been set free they declared; have set free

was put in; was set free 　 was shut into, is set free 　 put into, has been set freely 　 was put into; has been set free

does not is not are not has not"

Canada. Israel. German. Japan.

had gone is going has been went