If the students who killed themselves had only been more confident, their deaths ________.
| A．need have been avoided | B．must have been avoided |
| C．might have been avoided | D．will have been avoided |
Thinking that her daughter was doing homework, the mother left the room, __________.
| A．quickly and gentle | B．quick and gentle |
| C．quickly and gently | D．quick and gently |
Fully __________ in looking after three children at home, she no longer has time to enjoy various activities in the club.
| A．attached | B．occupied | C．contributed | D．devoted |
No matter how the teacher tried to read it, the sentence didn't __________ to me.
| A．understand | B．make sense | C．turn out | D．make out |
If we applied the special method to the Internet __________ people benefit a lot in daily life, it would be better.
| A．in which | B．through which | C．from which | D．for which |
Without proper lessons, you would __________ a lot of bad habits when playing the piano.
| A．pick up | B．catch up | C．keep up | D．give up |