Ⅰ.单句语法填空
1．In that case，ask to speak in person as soon as possible and say sorry.
2．But，if we are willing to learn(learn)，the opportunities are everywhere.
3．He can't/couldn't have stayed at home this morning.I saw him shopping in another city.
4．You mustn't smoke in this part of the hospital.
5．You ought to/should keep a simple first aid box at home for any accidents.
6．With her dad's permission(permit)，she spent the next two years researching online and conducting trials to get a recipe that was both tasty and toothfriendly.
7．He must have caught a bad cold last night，for his forehead felt burning.
8．Tom promised that he would not go there again.
9．If a student gets hungry on the long drives to and from school, Wilson never hesitates to buy(buy) them a meal.
10．I forced myself to believe that I would enjoy it and succeed in the future, but eventually I exhausted myself understanding the economy and trying new marketing techniques.
