__________ is responsible for the Chenzhou train collision will be punished.
| A．Whatever | B．No matter what | C． Whoever | D．No matter who |
It is strongly recommended that the machine_____________ every year.
| A．are checked | B．should check | C．checked | D．be checked |
Fully ________ looking after three children at home, she no longer has time to enjoy the various activities in the club.
| A．attached to | B．occupied in | C．contributed to | D．devoted to |
This is the second time that I__________ the same mistake.
| A．making | B．make | C．have made | D．to make |
---I’m sorry, I should not have been so rude to you.
--- You _______ your temper but that’s OK..
| A．have lost | B．had lost | C．did lose | D．were losing |
The job is fun and challenging. It is a job ________ you are doing something serious but interesting.
| A．where | B．which | C．when | D．that |