To win in these areas, the firm needs a sustainable __________ advantage.
| A．competitive | B．active |
| C．attentive | D．sensitive |
The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |
She is very dear to us. We have been prepared to do it takes to save her life.
| A．whichever | B．however | C．whatever | D．whoever |
— It’s the office! So you know eating is not allowed here.
— Oh, sorry.
| A．must | B．will | C．may | D．need |
答案A
But for the help of my English teacher, I the first prize in the English Writing Competition.
| A．would not win | B．would not have won | C．would win | D．would have won |
According to statistics, a man is more than twice as likely to die of skin cancer _________ a woman.
| A．than | B．such | C．so | D．as |