1 . If ______________ (give) better attention，the serious accident could have been avoided. (所给词的适当形式填空)

2 . The contradiction between unbalanced and inadequate development and the people’s ever-growing needs for a better life is ________ we must face up to.

A．that

B．what

C．how

D．where

3 . 我认为有些错误在所难免，关键是我们要从中吸取教训。(impossible)
_________________

4 . 这款国产电器一经问世便销售火爆。(sell)
_________________

5 . 为了营造舒适的就餐环境，许多餐厅不允许抽烟，这对广大顾客来说是一大福音。(forbid)
_________________

6 . Farming produced more food per person than hunting and gathering, so people were able to raise more children. And, as more children were born, more food ________ (need)．（所给词的适当形式填空）

7 . Angela can’t forget that year. Angela and her family spent the year together in China. (合并为含有定语从句的复合句)
→Angela can’t forget that year ________________.

9 . __________ made his mother angry is that the boy spent as much time playing games as he did studying. （用适当的词填空）

10 . Thinking that you know__________ in fact you don’t know is a serious mistake. （用适当的词填空）