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.

The test not only helps make our _____ acquired knowledge permanent, but also enables us to find out what needs to take more time to improve.

However, they can hardly blame me; it is ________ their own fault.

One should remain ______ and think of ways to escape when facing danger.

Although Linda tried hard in the exam, she did ______ than her brother.