________ basic firstaid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known |
| C．Knowing | D．Being known |
He is said ______ in the supermarket when he was doing shopping yesterday.
| A．to have been badly treated | B．treating badly |
| C．being badly treated | D．to be treated badly |
Pieces of bamboo or wood ________ books between 2nd and 5th century AD.
A. used to formedB. used to form
C. were used to formD. used to beforming
Washing machines made by China have won ______worldwide attention and Haier has become _____popular name.
| A．a; the | B．/; a | C．/;the | D．the; a |
Having sent several mails to apply for jobs, Susan waited for a reply, but ___ came.
| A．nobody | B．nothing | C．none | D．neither |
— What are you going to do this weekend?
— _____. If time permits, I may go to Shanghai with my friends.
| A．Don't mention it | B．It doesn't matter |
| C．Forget it | D．It depends |