C. Complete the sentences with should/shouldn't 
1.If the delivery is urgent,you_______send it express post.
2.I think we______get paid commission for our sales.We'd be more motimotivated that way!
Writing
A.Put the words in the correct order to make the right sentences.
1.How/we/lucky money/spend/our/should/?
2.and friends so that/visit their relatives/New Year's wishes/They usually/they can exchange /./
3.Colourful fireworks/the sky/when/midnight /light up/strikes /the clock /.
4.have to /go/We /to/at Tet/don't/school.
5.Chung cake/next week /My/often/mother/make/Tet.
6.cleaning/To/people/for/their/spend time /houses/prepare /Tet/often/for.