There is no known_____for this disease but it can be______.
| A．cure, treated | B．cured; treat | C．cure; treat | D．treat; cured |
It usually takes courage to _____ an invitation.
| A．turn down | B．turn up | C．turn out | D．turn to |
--- The weather is too cold _____ March this year.
--- It was even _____ when I came here years ago.
| A．for; colder | B．in; cold | C．in; hot | D．for; hotter |
He is rather difficult to make friends with, but his friendship, _____, is more true than any other.
| A．once gained | B．when to gain | C．after gaining | D．while gaining |
On rainy days, accidents _____ happen sometimes on steep roads.
| A．should | B．shall | C．must | D．can |
The interview he paid little attention to _____ him the chance to work in this company.
| A．being cost | B．be cost | C．costing | D．cost |