1 . His ________ (addict) to computer games got his parents anxious, but I found it really ________ (challenge) for him to quit. (所给词的适当形式填空)

2 . Treatments of anxiety and drug ________ (addict) are other valuable and cost­effective applications of VR. (所给词的适当形式填空)

3 . The drug is so _______that he is addicted to it. Therefore, it’s hard for him to get rid of the _______to it. (addict) (所给词的适当形式填空)

4 . The drug is so _______ that he is_______to it. Therefore, it’s hard for him to get rid of the _______ to it．(addict) (所给词的适当形式填空)

5 . The _________(addicted) to sweet food is hard to remove. （所给词的适当形式填空）

6 . She kicked her three-pack-a-day cigarette, and overcame her _________ (addict) to alcohol. (所给词的适当形式填空)

7 . People________(addict) to smoking have great difficulty in getting rid of the________(addict). (用所给词的适当形式填空)

8 . Smartphone__________(addict) has spread like an infectious disease. （用所给词的适当形式填空）

9 . His________(addict) to drinking and smoking has led to the divorce. (所给词的适当形式填空)

10 . The child’s Internet _________ (addict) made him not concentrate on his studies at all. (所给词的适当形式填空)