When he saw a little boy ______ in the river, he took off his shirt and jumped into the water.
| A．struggles | B．struggling | C．to struggle | D．struggle |
No matter how frequently ______, the works of Beethoven still attract people all over the world.
| A．performed | B．performing | C．to be performed | D．being performed |
There are two lakes near Joe’s hometown, the larger of is nearly ten thousand square kilometers.
| A．whose | B．whom | C．which | D．where |
Perhaps it is true that nobody in the world knows exactly how the earth _____.
A. came up B
. came out C. came to power D. came into being
She is very _______ about this topic, so we’d better not discuss it in front of her.
| A．confident | B．crazy | C．sensitive | D．humorous |
I suggested that they set off early to avoid (避开) the traffic jam, _______ no one responded.
| A．on which | B．to which | C．about which | D．for which |