The tall tree. leaves are darker than those of the other two,is as old as grandpa.A．whichB

According to the passage, which of the following is true of acid rain？A．Tree leaves die of

In autumn, the（)fall down from the trees.A.leafB.leafsC.leaves

There was no snow, the leaves were gone from the trees, and the grass was dead.

No two leaves from the same tree are ________.A identicalB originalC analyticalD criti

Birds are abundant in the tall vegetation.

Birds are abundant in the tall vegetation.