It will not be long _____man can harness the solar energy and make it serve mankind.
| A．since | B．before | C．when | D．after |
---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 |
31. ---Did you receive his call last night？I was disturbed several times.
---He ______ again. That’s his typical style.
| A．should be blind drunk |
| B．may be blind drunk |
| C．must have been blind drunk |
| D．could have been blind drunk |