—What should we pay more attention to if we go camping in the mountains?
—Nothing special. Take a special pair of glasses _______ the wind there is strong and cold.
| A．even if | B．in case | C．providing that | D．so long as |
When asked to explain ________ made his lessons so exciting, the teacher kept silent.
| A．what it was that | B．that what it was |
| C．what was it that | D．that what was it |
Whenever a natural disaster happens, we should offer ____ help we could to those victims.
| A．however | B．whatever | C．whenever | D．whichever |
—May I speak to your manager at 4：00 this afternoon?
—Sorry, sir. He ________ to a meeting soon.
| A．would go | B．has gone | C．will have gone | D．is going |
Though having lived abroad for years, many Chinese stillthe traditional customs.
| A．observe | B．possess | C．perform | D．support |