—Charlie has been nowhere for three days. What has happened to him?
—Didn’t you know he had gone to Hong Kong?
| A．in sight | B．in place | C．in face | D．in use |
Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
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 |
—Would you like to help us?
— , no.
| A．In a word | B．In words | C．In word | D．In other words |
You can’t see things clearly through a telescope unless it is correctly ________to your sight.
| A．Adjusted | B． Examined | C． Checked | D． tested |
They desired that they_______ the right to vote.
| A．had | B．have | C．are | D．Were |