After the new technique was introduced, the factory produced _____ cars in 2010 as the year before.
| A．as twice many | B．as many twice | C．twice as many | D．twice many as |
Barbara is easy to recognize as she’s the only one of the women who _____ evening dress.
| A．wear | B．has worn | C．have worn | D．wears |
---How much salt did you put in the dish?
--- _____.
| A．None | B．Nothing | C．No | D．No one |
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 |