The lecture was so complex that I simply couldn’t ______ at all. Could you explain it to me?
| A．bring on | B．bring in |
| C．take on | D．take in |
．Frank put the mediocre in the top drawer to make sure it would not be_______ to the kids.
| A．accessible | B．relative | C．acceptable | D．Sensitive |
．I can_____be a teacher. I’m not a very patient person.
| A．seldom | B．ever | C．never | D．always |
. The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
| A．mainly | B．punctually | C．approximately | D．Precisely |
. As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
| A．primary | B．alternative | C．instant | D．Unique |
. It seems that living green is______easy and affordable. A small step masks a big difference.
| A．exactly | B．fortunately | C．surprisingly | D．hardly |