在黑暗中他撞上了一样东西。

⑤I ________________ an old friend of mine in the park.

我昨天在公园里碰见一位老朋友。

⑥Someone ________________________ the door.

有人在敲门。

【答案】①knocking him over/down　 ②knocked out　 ③Knocked off　

④knocked against　 ⑤knocked into ⑥is knocking at

2. pick off去除；剪掉；摘去；撕掉

Her husband took off her blouse and picked off bits of the blouse stuck to the burn.

她的丈夫脱下她的衬衣，还把粘在伤口上的碎布拉了下来。(教材P35)

☛Pick off all the dead leaves off the flower.

把这棵花上的枯叶全部摘掉。

☛Don't pick off any of the flowers.

这些花一朵也不要摘。

【归纳拓展】

pick up 　捡起，拾起；(偶然)学会；收听(节目等)；恢复；

让人乘车，搭载

pick out 　 挑选出；认出来，辨别出

【跟踪典例】

(1)写出下列句子中pick短语的含义

①I'm going to pick out a few books to send to some friends in South China.________

②I am able to pick you up on the short wave radio.________

③Can you pick out the right one？________