John was seen ____ in by the back door, but nobody saw him ___.
| A．to come…to leave | B．come… leave | C．to come… leave | D．come…leaving |
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 |
Fitness is important in sport, but of at least_______ importance are skills.
| A．fair | B．reasonable | C．equal | D．proper |
Small cars are ___ of fuel, so they have more appeal for consumers.
| A．free | B．short | C．typical | D．economical |