Ⅰ.单句语法填空
1．We will put off the picnic in the park until next week，when the weather may be better.
2．Mr Smith，from whom I have learned a lot，is a famous scientist.
3．A lot of language learning，as has been discovered，is happening in the first year of life，so parents should talk much to their children during that period.
4．Scientists have advanced many theories about why human beings cry tears，none of which has been proved.
5．The books on the desk，whose covers are shiny，are prizes for us.
6．In the middle of the room were (be)two big vases then.
7．The Nelsons are hoping to settle in Australia in the near future.
8．At the party there was food and drink in abundance (abundant).
9．He apologized for his not being able to inform me of the change in the plan.
10．This highway is parallel to/with the railroad.
