The speaker raised his voice but still couldn’t make himself ______.
| A．heard | B．to hear | C．hearing | D．hear |
Evidence obtained from observation and experiment is often used to ________ a scientific theory.
| A．confirm | B．claim |
| C．conclude | D．calculate |
．Faced with a problem，you have to ________ it first，and then try to find a solution.
| A．resemble | B．substitute |
| C．concentrate | D．analyze |
Teaching pronunciation class to a mixed group of learners can ________ a teacher with many challenging problems.
| A．provide | B．produce |
| C．present | D．offer |
All my pockets have been ________ but I can’t find my keys.
| A．got through | B．given out |
| C．gone through | D．gone down |
—OK，I’ve had enough of it.I give up.
—You can’t________your responsibilities. (2012·江苏，26)
| A．run off with | B．run up against |
| C．run out of | D．run away from |