It is well known that too much ________ to the sun can promote the development of many skin cancers.
| A．contact | B．disclosure | C．exposure | D．exhibition |
They appearedme, so I had to explain to them.
| A．misunderstanding | B．misunderstood |
| C．to be misunderstood | D．to have misunderstood |
If China’s space technology has achievedbreakthrough in this field, it really is
amazing wonder.
| A．the; an | B．a; an | C．不填; the | D．a; 不填 |
Though he is in his late sixties, the well-known biolo
gist begins each day ____ a sense of adventure and a sense of curiosity.
| A．in | B．with | C．of | D．at |
The chairman was about to declare the conference open ____ the lights went all out.
| A．as | B．while | C．then | D．when |
--- Oh, you haven’t read my e-mail?
--- Sorry, I haven’t had any ____ to the computer these days.
| A．access | B．attitude | C．attention | D．approach |