The ancient village, ______ they visited during a recent trip, is the only tourist attraction ______ is well protected without any damage.
| A．which, which | B．which, that | C．where, that | D．that, which |
At the routine office meeting, the headmaster insisted that the problems _______ paid special attention to.
| A．referred to being | B．referred to be | C．refer to being | D．refer to be |
_______ basic first-aid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known | C．Knowing | D．Being known |
People develop _______ preference for a particular style of learning at _______ early age and these preferences affect learning.
| A．a; an | B．a; 不填 | C．不填; the | D．the; an |
—Is the chemistry experiment easy? —______. I’ll just do my best.
| A．I think so | B．Certainly | C．Not a little | D．Anything but |
The number 5.12 is a special number,__ ,I think, that will be remembered by Chinese people forever.
| A．what | B．it | C．which | D．one |