We don’t have to keep these old chairs any more. ________, they are falling apart（支离破碎）.

He looked at those jewels one after another ______and seemed to show no interest in any one of them.

This pair of trousers isn’t good but that pair is ____better.

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 museum was___opened this morning and some officials attended the opening ceremony(开幕式).