. Have you got a free evening next week? _______, let’s have dinner.
| A.While so | B.Since so | C.When so | D.If so | 
I hear____ boys in your school like playing football in their spare time, though others prefer basketball.
| A.quite a lot | B.quite a few | C.quite a bit | D.quite a little | 
Of the two sisters, Betty is_______ one, and she is also the one who loves to be quiet.
| A.a younger | B.a youngest | C.the younger | D.the youngest | 
Letterboxes are much more _______ in the UK than in the US, where most people have a mailbox instead.
| A.common | B.normal | C.ordinary | D.usual | 
I wish you’d do ________ talking and some more work. Thus things will become better.
| A.a bit less | B.any less | C.much more | D.a little more | 
Green products are becoming more and more popular because they are environmentally _____.
| A.friendly | B.various | C.common | D.changeable |