课时作业9 Unit 9 Wheels
一、单元扣点
Ⅰ.单词拼写
1．He could have finished it on schedule, but ________(不知何故地) he fell behind.
答案 someho w
2．The ________(数字) is of great significance in many respects.
答案 figure
3．Unlike ________(太阳的) or wind power, heat from the rocks is always on.
答案 solar
4．________(实际上), it's we that owe you a lot.
答案 Actually
5．He has broken his leg and ________(因此) he can't walk.
答案 therefore
