英语单词的辨析

A组. pull和pick

pull 拉 例如：Don't pull my hair!别拉我的头发！
pull off 脱, 努力实现, 赢得 例如：1. The Browning brothers accused each other, saying" What on earth are you trying to pull off against me?"布朗宁兄弟互相责怪说：“你究竟想搞什么鬼名堂来坑害我？”2. She pulled off a great coup in getting the president to agree to an interview.她竟然办到了让总统同意接受采访.

pick 摘，挑选 例如：1.He picked the watch up from the carpet.他从地毯上把表捡起来。2.The child has picked a hole in his new jumper.孩子的新毛衣上勾了一个洞。3.He picked her a rose.他采了一朵玫瑰给她。
pick off 采摘 例如：1. Don't pick off any of these flowers.这些花一朵也不要采摘。2. The gardener picked off the dead flowers.园丁把所有凋谢的花朵摘了下来。

综上所述， The monkeys are( picking )peaches off the tree.

B组. cross、across、through（我估计你打错了，不是though，而是through吧）、over

across (介词，前面要加动词才能用)横过，穿过，指从……的一边到另一边（指平面地通过） 例如：I swam across the river.我游过了河。He went across the street.他走过街。
cross (动词)穿过（也是平面穿过） 例如：He acrossed the street.他过了街。
through （介词，前面也要加