(2014·四川省攀枝花市模拟)—Tom has played a lot of computer games recently.—Yes，that might ________his failure in the mid­term examinations.

107 The Curies are best known for ____radium and they won the Nobel Prize in 1903

The books on the chair __________ Mike’s, right—Yes, they are.

Anxiously, she took the dress out of the package and tried it on, only ________ it didn’t fit.

What color is your backpack –____________.