It’s not easy for the expert to ______ pig flu.in humans from regular human seasonal influenza.
| A．distinguish | B．separate | C．identify | D．recognize |
Better not call the manager between 8 and 9 this evening, for he_________ an important meeting then.
| A．will have | B．would have | C．will be having | D．will have had |
Listening to peaceful music. as well as taking exercise,___________ a lot in relieving people 's sad emotions.
| A．help | B．helped | C．helps | D．are helping |
The man__________has made up his mind to win will never say "impossible".
| A．whom | B．when | C．which | D．who |
Only when___________ according to the directions can the medicine be quite effective.
| A．taking | B．taken | C．being taken | D．having been taken |
To be successful, you need to remember that ___________you might be very busy, you need to be energetic and enthusiastic.
| A．as though | B．in case | C．even if | D．now that |