问题
Trees and flowers ________every year to make our country more beautiful.
A:is planted
B:was planted
C:are planted
D:were planted
B:was planted
C:are planted
D:were planted
正确答案是：
同类题型
Attention, please. Sorry to tell you the flight has to be ______because of the heavy snow.
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Could you tell me when the new park ________________?—Sorry, I am not sure. Maybe next month.
If we ______ take environmental problems seriously, the earth _______ worse and worse.