Most children with healthy appetites are ready to eat almost anything that is offered and a child rarely dislikes food __________ it is badly cooked．
| A．if | B．until | C．that | D．unless |
He goes there __ than I .
| A．often | B．more oftener | C．more often | D．as often as |
Would you be __ kind as to lend me a hand?
| A．as | B．very | C．so | D．too |
Of all the studetts, he prepares his lessons ___.
| A．most carefully | B．more carefully | C．much carefully | D．most careful |
---How old is your sister? --She is __ than I.
| A．older six years | B．six years older | C．six years elder | D．older by six year |
I don’t think English is __ a language as Russian.
| A．difficult as | B．as difficult | C．more difficult | D．difficult |