For some time now, Chinese people under the leadership of CPC____ the contents of Scientific Development Theory in the course of practicing socialism in China．
| A．had been improving | B．have been improving |
| C．were improving | D．improved |
It is said that books on ______ popular science are in ______ short supply.
| A．the; a | B．/; / | C．/; the | D．the; the |
--Did you see “Running Man”?
--- ______. Smart man(潮人)，you know.
| A．No problem | B．Why me？ |
| C．That’s for sure | D．Why bother？ |
---Why should you be so late today ?
---I got stuck in the heavy traffic, or I ____________here earlier.
| A．had arrived | B．arrived |
| C．would arrive | D．would have arrived |
---Look，what a mess in the kitchen！
---I ______cooking fish in a new way and I really have no time to tidy it up now.
| A．tried | B．had tried |
| C．will try | D．have been trying |
______you may have，you should gather your courage to face the challenge.
| A．However a serious problem | B．What a serious problem |
| C．However serious a problem | D．What serious a problem |