It is _____that he has been addicted to the drugs and has difficulty quitting it.

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.

An American girl survived the plane crash that killed the rest of the passengers _____.

Interviews were carried out ________ over the telephone，via e－mail or fax or face to face in four cities including Beijing，Shanghai，Guangzhou and Wuhan.

I can’t say I’m the best. I have only _________ made more efforts than others.