A feather falls slower than a stone only because the air holds the feather back more than it ______ the stone.
| A．does | B．holds | C．will | D．is |
Suddenly, the lightning flashed through the clouds, nearly ____ Paul.
| A．beating | B．blinding | C．burning | D．touching |
The book was written in 1946, _____ the education system has witnessed great changes.
| A．when | B．during which | C．since when | D．since then |
—Why didn’t you come to my birthday party last night?
—I planned to, but my parents simply not let me out so late at night.
| A．could | B．might | C．would | D．should |
—You look upset. What’s the matter?
—I had my proposal again.
| A．turning down | B．turned down | C．to turn down | D．turned to |
Victor apologized for to inform me of the change in the plan.
| A．his being not able | B．his not being able |
| C．him not to be able | D．him to be not able |