1.AS summer (approaches),we are doing a through cleaning to wipe all the survived mosquitoes out.
2.句子转换whatever the reason换成 , what reasons there are,
3.Instead of telling the joke he had planned,he invented a new one.
He didn't tell the joke he planned, instead, he invented, a new one.
4.He stopped working as if he was trying to make room.
He stopped working so as to make room.