One of the requirements for a fire is that the material ____ to its burning temperature.
| A．is heated | B．will be heated | C．be heated | D．would be heated |
Shortly after suffering from a massive earthquake and to ruins, the city took on a new look.
| A．reducing | B．reduced | C．being reduced | D．having reduced |
The president of the World Bank says he has a passion for China , he remembers starting as early as his childhood.
| A．where | B．which | C．what | D．when |
Anyone, once ____ positive for H7N9 flu virus, will receive free medical treatment from our government.
| A．to be tested | B．being tested | C．tested | D．to test |
Evidence has been found through years of study______ children’s early sleeping problem likely to continue when they grow up.
| A．why | B．how | C．whether | D．that |
I must find out why＿＿＿＿so many students made the same mistake.
| A．is it that | B．was it which | C．it is what | D．it was that |