The buses, _____ were already full, were surrounded by anxious people.
| A．all of them | B．all of which | C．they all | D．all which |
The soldier rushed into the cave, his right hand _____ a gun and his face _____ with sweat.
| A．held; covered | B．holding; covering | C．holding; covered | D．held; covering |
The war was the result of their _____ for more land.
| A．idea | B．mind | C．hope | D．desire |
The huge picture looks more beautiful _____ the blue sky.
| A．to | B．against | C．over | D．under |
Ms. Claire is a strict but kind teacher, _____ I respect and appreciate most.
| A．that | B．what | C．one | D．which |
There is a small group of English words which even some native speakers and writers find _____.
| A．puzzled | B．to be puzzled | C．to puzzle | D．puzzling |