—Did you call to book a ticket for the concert ?
—Not yet, but I _______ .
| A．should have | B．may | C．ought to | D．shall |
To answer a telephone call, the careless woman went out of the kitchen, ________ the soup ________ over the gas.
| A．left; cook | B．leaving; being cooked |
| C．leaving; cooking | D．left; being cooked |
Curious and ________， I rushed out of my dormitory when I heard the noise of three gunshots.
| A．astonishing | B．being astonished |
| C．astonished | D．to be astonished |
There are some tall trees in our campus, some ________ more than forty meters.
| A．measure | B．measured |
| C．measuring | D．to measure |
People believe that the China Dream is not very difficult ________ so long as the whole nation works hard for it.
| A．realizing | B．to be realizing |
| C．realized | D．to realize |
These diagrams are especially helpful when we have a concrete problem ________ at hand.
| A．be solved | B．to solve |
| C．solved | D．being solved |