It is only _______ your heart is really in it _______ you can play your best.
| A．that; that | B．that; when | C．when; that | D．when; when |
After＿＿＿seemed a hopeless wait, four coal miners trapped in the mine for 125 hours were finally rescued in Heilongjiang Province.
| A．when | B．that | C．it | D．what |
Nelson Mandela’s fellow campaigner, Archbishop Desmond Tutu, said Mr. Mandela was “not only an amazing gift to humankind, but he also made South Africans and Africans feel good about being _______ we are. He made us walk tall.”
| A．what | B．where | C．when | D．who |
It is widely believed that an apple which fell from its branches were the _______ for Newton’s discovery of gravity.
| A．intelligence | B．Acquaintance |
| C．application | D．inspiration |
Raising _______ retirement age in progressive steps is in _____ line with China’s labor market realities and should be prioritized, an official said Tuesday.
| A．the ; / | B．/; the |
| C．/; / | D．the; the |
It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．
| A．when; which | B．when; that |
| C．that; which | D．that; that |