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1、B.there aren"t
说明:这个句型是 there be 句型的倒装句。句子的实际位置应该是:there ------ any birds Behind the tree。 这样句子的结构就很清晰了,主语是any birds,any多用于疑问句和否定,复数所以排除A、C、D,选B
2、D.watch
说明:这是一般叙述句,只对一般发生的情况做说明。换成肯定句就是Mary watches TV in the evening.换成否定句就除掉es,gel kayano asics,选D