“Sorry” is the hardest word to say sometimes. _______ you know you’ve done something wrong, or something inappropriate, it takes courage to say sorry.
| A．Only if | B．Even if |
| C．If only | D．As if |
--- How are you, Jack?
---_________, I’m rather sick.
| A．In addition | B．As a matter of fact |
| C．On the other hand | D．On the contrary |
The majority of rural migrants are engaged in the most painstaking, most tiring and dangerous work, _______ college graduates are reluctant to do.
| A．while | B．that | C．what | D．which |
The key to ___ new ideas is to observe daily life carefully, and not to take things for granted.
| A．coming up with | B．getting along with |
| C．catching up with | D．ending up with |
After walking in the Shanghai World Expo for a whole day, my legs ____ under me and I couldn’t walk any farther.
| A．gave up | B．gave out |
| C．gave in | D．gave away |