These diagrams are especially helpful when we have a concrete problem ________ at hand.
| A．be solved | B．to solve |
| C．solved | D．being solved |
Would it be ________ for you to pick me up at four o’clock and take me to the airport?
| A．confident | B．constant | C．delighted | D．convenient |
— Sorry, I have to ________ now. It’s time for class.
— OK, I’ll call back later.
| A．hang up | B．hang on | C．hold on | D．hold up |
You’d better ________ your coins, and see how long you can last.
| A．add up to | B．add up | C．add to | D．add |
________, what she had devoted herself to resulted in nothing but failure.
| A．To her much disappointment | B．To her great disappointment |
| C．Great to her disappointment | D．To her disappointment much |
I turned back only to find an old schoolmate whose name ______ me for the moment.
| A．escaped | B．avoided | C．failed | D．slipped |