—Must I turn off the gas after cooking?

—Of course. You can never be             careful with that.

A. enough                B. too                     C. so                      D. very

 Mr. Smith owns ________ collection of coins than anyone else I have ever met.

A. larger   B. a larger   C. the largest   D. a large

 Although she did not know Boston well, she made her way __      to the Home Circle Building.

A. easy enough    B. enough easy   C. easily enough    D. enough easily

 What a table! I’ve never seen such a thing before .It is________  it is long.

A．half not as wide as                               B．wide not as half as

C．not half as wide as                               D．as wide as not half

 Green products are becoming more and more popular because they are environmentally ________.

A. friendly       B. various'        C. common        D. changeable

 David has won the first prize in singing; he is still very excited now and feels ________ desire to go to bed.

A．the most              B．more                   C．worse                 D．the least

 I'm certain David's told you his business troubles. ______, it's no secret that he owes a lot of money to the bank.

A. However       B. Anyway          C. Therefore            D. Though

 Although my grandfather is in his eighties, he is still as ________ as a young man and hates sitting around doing nothing all day.

A. enthusiastic           B. intelligent               C. energetic                 D. sensitive

 It’s hard for him playing against me. I’ve got nothing to play for, but for him, he needs to win so ________.

A. far            B. well          C. little           D. badly

 —John is very            .

—if he promises to do something he’ll do it.

A. independent B. confident C. reliable  D. flexible