The teacher highly recommended that I ___________ more to improve my English.

A．would practice

B．could practice

C．practice

D．practiced

甲路过某自行车修理店，见有—辆名牌电动自行车(价值l万元)停在门口，欲据为己有。甲见店内货架上无自行车锁便谎称要购买，催促店主去50米之外的库房拿货。店主临走时对甲说：“我去拿锁，你帮我看一下店。”店主离店后，甲骑走电动自行车。甲的行为构成何罪( )

A．诈骗罪

B．盗窃罪

C．侵占罪

D．职务侵占罪