Apple’s iPad2 uses a 9.7-inch touch screen like the iPad. ______, it is equipped with a pair of new cameras, which the iPad doesn’t have.
Scientists think they have _____ in their attempt to find the causes of some major dieases.
If you ever have the _____ to go abroad to work, you should take it.
I'd like to take _____ of this opportunity to thank you all for your cooperation.
I could tell he was surprised from the _____ on his face.
We had a marvelous holiday: only the last two days were slightly _____ by the weather.