陕西省2015高考英语人教版一轮课时作业及解析：必修5 Unit 5
课时作业(二十五) 必修5 Unit 5 First aid[
Ⅰ.单词拼写
1．The biggest problem I have to face is the language________(障碍) when I go abroad.
2．He slowed the bleeding by applying pressure to the wounds until the police and an________(救护车) arrived.
3．The________(复杂的) operating systems of computers are difficult for some aged people who lack knowledge about computers.
