The prime minister said that ______ students lack nowadays is devotion and patience.
| A．how | B．why | C．what | D．if |
.
--What did you think of the performance given by the famous dancer?
---Not so good. In fact, it ________ to be a great disappointment.
| A．turned up | B．turned out | C．turned in | D．turned down |
.
It is written clearly in the requirements that all passengers______check onto board thirty minutes before the plane takes off.
| A．may | B．can | C．will | D．shall |
.
The size of the audience, ______we had expected, was well over one thousand.
| A．whom | B．who | C．which | D．as |
.
______the zoologists tried to prove was that the photo of the South China Tiger had been staged or technologically dealt with.
| A．That | B．Why | C．Whether | D．What |
.
It is______the customers’ needs that has made chain stores so popular in big cities in China.
| A．meeting | B．met | C．to have met | D．being met |