I really enjoyed your talk, ________ there were some parts I didn’t understand.
| A．because | B．unless | C．though | D．after |
In the past the children were made ______15 hours a day.
| A．to lock | B．work | C．to work | D．lock |
When I got to school, Amy ______his homework.
| A．had invented | B．had finished | C．had developed | D．had rushed |
Did you see Peter and Mike? No, I saw ______of them.
| A．neither | B．either | C．both | D．none |
Gina loves singers _______ write their own music.
A. which B. who C. has worked
Jim _________ in Zhuzhou since he finished his college.
A. works B. is working C. has worked