—Nowadays a growing number of people go to work by bike.
—Bicycling is good exercise；________it doesn't pollute the air.
| A．therefore | B．moreover | C．however | D．otherwise |
She studies ___ medicine before she turned ___ writer.
| A．×; × | B．the, a | C．×; a | D．the; × |
A non-smoker can hardly imagine__ pleasure of having__ smoke after a meat.
| A．1, a | B．a, a | C．the, a | D．1,1 |
British people always talk about wether.
| A．the; the | B．/ ,/ | C．/; the | D．the; / |
He is doctor at all. Don’t trust him.
| A． no | B． not | C．any | D．a |
He is a member of our .
| A．brain power | B．brains power | C．brain powers | D．brains powers |