．______Hard you may try, you can’t possibly persuade Tom to give up smoking, for he is so addicted to it.
| A．Whatever | B．However | C．Whichever | D．Whenever |
After summer rain, the rainbow looks more beautiful ____ a blue sky.
| A．in | B．against | C．on | D．within |
-- Mommy, I’d like some more chocolate.
-- Sorry, there is ____ left.
| A．none | B．some | C．a little | D．Few |
The manager made her employees know that hard work would____ one day.
| A．give off | B．pay off | C．come off | D．see off |
What a nice bike! Where ____ you ____ it?
| A．do ; buy | B．have ; bought |
| C．will ; buy | D．did ; buy |
-- Shall I go and buy more fruit for the party?
-- No, I have already bought 3 baskets. That ____ be enough.
| A．can | B．should | C．may | D．Might |