The boy was made to the explanation(解释，说明 process of explaining) .
| A．speak | B．tell | C．repeat | D．say |
The world’s elderly population will exceed(超过) ____ of children by 2060,when each group ____ to account for about one fifth of the population.
| A．that; expects | B．those ; will expect |
| C．that ; is expected | D．one ; will be expected |
Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.
| A．it, it | B．what, what |
| C．it, what | D．what, it |
My friend Mary is _____ beautiful girl and _____ girl everyone likes to work with.
| A．a, a | B．a, the |
| C．the, a | D．the, the |
—Do you let your kids travel by themselves at night?
—________! It couldn’t be more dangerous.
| A．Of course | B．Not at all | C．Absolutely not | D．I’m not sure. |
－What do you think of the party last night?
－Wonderful! It’s years I enjoyed myself so much.
| A．after | B．when | C．before | D．since |