The buses, ____were already full, were surrounded by an angry crowd.
| A．most of them | B．most of which |
| C．which most | D．that most |
People who tend to focus on ______ while speaking a foreign language may find that they worry too much about making mistakes.
| A．fluency | B．agency | C．policy | D．accuracy |
Life is like _________ ocean; only ________ strong-willed can reach the other shore.
| A．an; a | B．an; the |
| C．the; the | D．the; a |
The two girls are so alike that strangers find________difficult to tell one from the other.
| A．it | B．them | C．her | D．that |
The manager had fallen asleep where he_______，without undressing.
| A．was laying | B．was lying |
| C．had laid | D．had lied |
Give yourself 10% of________is left for your work and let me have the rest.
| A．which | B．that | C．what | D．where |