完形填空（共10小题；每小题1.5分，满分15分）
阅读下面短文，从短文后各题所给的三个选项（A、B和C）中，选出最佳选项。
A mother planted many kinds of vegetables in her garden．One day，she said to her   ，“Betty，come here．Look at all these little yellow marks on the       of the cabbages．They are eggs of a kind of insect(虫子)．They are very beautiful but very bad for cabbages．This afternoon you must   all the eggs on the leaves and kill them．In this way，you will help us have   ，greener and bigger cabbages．”
Betty didn’t think she should do it  and in the end she forgot all about it．The mother fell ill for a few days and   work in her garden. When she was well，she took Betty with her to the garden to see the cabbages．To  surprise，the insects had eaten every leaf。When Betty saw this，she began to   ．Then her mother said to her．“We should never put off what we have to do today till   ．And you must learn to deal with the bad things while they are small，  10 it will turn into a big problem．”
A．son B. mother     C．daughter
A. trees B. leaves     C．grass
A．find     B. eat     C．fly
A．worse     B．better     C. thinner
A. at most     B．at last     C．at once
A．must     B. couldn’t     C. need
A. my     B. their     C．his
A．cry     B．wait     C．run
A. yesterday     B. today C.  tomorrow
A. but     B. or     C．and