[Listening and Talking]
Ⅰ.单句填空
1．The __subway__(地铁) plays a key role in the city's transportation system.
2．One of the biggest expenses in the home is __petrol__(汽油) and electricity.
3．She promised to help me move into my new __apartment__(公寓套房) on the weekend.
4．We are honestly so happy to have you all in the course this __semester__(学期).
5．There are more and more homeless people __begging__(beg)on the streets these days.
