21.当外星人出来时,女孩正在购物.The girl was shopping when the alien ______ ____.
22.他站在同学们前面.He is standing _____ ________ _____ his class.
23.当飞机起飞时,你在做什么?When the plane ________ ________,what were you doing?
24.喝杯咖啡怎么样?________ _________ drinking a cup of coffee?
25.首先,你应该说对不起._______ _____ _____,you should say you’re sorry.
26.他说他对汤姆很生气.He said he _______ _______ ______ Tom.
27.我告诉她我将在第二天去公园.
I told her I __________ go to the park ______ _______ ________.
28.他说他擅长口语.He said he _______ _______ ______ speaking.
29.当我长大后,我将环游世界.
When I ________ _______,I will ________ _________ ________ __________.
30.高中毕业后,我想上大学.I want to _______ _______ __________ after I leave high school.