Supply the comparative form of the adjectives in the brackets

The CDs are (old) (a)   than the DVDs.

This test is (important) (a)   than any other tests.

This dress is (beautiful) (a)   than that dress.

My sister is (good-looking) (a)   than I am.

A book is (wonderful) (a)   than a comic.

She is (happy) (a)   than I am.

This bike is (cheap) (a)   than mine.

The new teacher is (nice) (a)   than the old one.

The chocolate looks (bad) (a)   than the candy.

The radio is (new) (a)   than the DVD player.