阅读下面短文，用方框中所给单词的适当形式填空，使短文意思通顺、正确、连贯。
Everyone wants to have healthy teeth. When you laugh, you will open your mouth and _小题1:______ your teeth. The healthier your teeth are, the happier you feel. Why is that?
It’s because your teeth are important in many ways. You can take .___小题2:_____ of your teeth by doing like these:
Brush your teeth ______小题3:___ a day, after getting up and before going to bed. And brush all of your teeth, not just the ____小题4:____ ones. Spend at least three _____小题5:____ each time you brush. Be sure your toothbrush is _______小题6:__. You should use your toothbrush for three months and then ____小题7:____ it.
Clean your teeth with dental floss(牙线). It feels ___小题8:___ when you do it for the first time, but soon you’ll get used to do that. Brushing __小题9:___ your teeth healthy. You also need to care about what you eat and drink. Eat a lot of fruits and vegetables and drink water _____小题10:__of other drinks.
Do you want have white and healthy teeth? Please brush your teeth!
小题1:show
小题2:care
小题3:twice
小题4:front
小题5:minutes
小题6:soft
小题7:change
小题8:strange
小题9:keeps
小题10:instead
题目分析：每个人都想很健康，牙齿健康也是非常重要的。我们每天必须刷两次牙齿，早晨起床和晚上睡觉前。刷牙要至少3分钟，牙刷三个月要换一次。并且不能只刷前面的牙齿，只有这样才能让牙齿保持健康。也可用牙线刷牙，不过很多人不习惯。
小题1:此题考查动词，张开嘴露出牙齿，故用动词show。
小题2:此题考查动词短语take care of表示关心照顾
小题3:此题考查固定短语twice a day表示一天两次此句的含义是我们要一天刷两次牙。
小题4:此题考查名词，根据语境可知此句的含义是我们应该刷所有的牙，不仅仅是前面的
小题5:此题考查名词，根据语境可知此句的含义是我们刷牙至少要用3分钟故填minutes。
小题6:此题考查形容词，根据语境可知此句的含义是牙刷必须是柔软的，故选soft。
小题7:此题考查动词，牙刷每三个月要换一次，故用动词change。
小题8:此题考查形容词，因feel是系动词其后要用形容词，根据语境可知用牙线刷牙感觉很奇怪，故选strange。
小题9:此题考查固定短语keep sth/sb+形容词表示让某人或某物处于某种状态。因动名词做主语故用keeps.
小题10:此题考查介词短语instead of表示代替。
点评：该题型是考试中常见的题型，做题时首先要根据句意从方框中选出合适的动词，然后根据时间状语判断该句应用哪种时态，从而变换动词的形式