Please ______ the traffic regulations.
| A．observe | B．take | C．see | D．look |
Every boy and every girl ______ that each day and each hour brings ______ duty.
| A．know；their | B．knows；their | C．knows；its | D．know；its |
—What do you think of the meal we have just had?
—It is well worth ______ is changed for it.
| A．that | B．what | C．which | D．how many |
It was foolish of him to ______ his notes during that important test，and as a result，he got punished.
| A．stick to | B．refer to | C．keep to | D．point to |
The instructor asked us to list anything in our past that we felt ______ of，regretted and read our lists aloud.
| A．ashamed | B．afraid | C．sure | D．proud |