Most parents are not __________ the danger of their babies’ eating jelly, which causes most unfortunate incidents to happen.
| A．well aware to | B．very aware of | C．aware that | D．well aware of |
___ from the hill, our school looks very beautiful.
| A．Seen | B．Seeing | C．To see | D．Having seen |
Is this museum ___ some foreign friends visited that day?
| A．where | B．which | C．that | D．the one |
Edison never stopped ___ new and better ways to do things.
| A．to search for | B．searching for | C．to search | D．searching |
Although it’s raining, ___ are still working in the fields.
| A．they | B．but they | C．and they | D．so they |
Is ___ possible to fly to the moon in a spaceship?
| A．now | B．man | C．that | D．it |