选择括号内恰当的单词填入空白处,使句意完整正确。小题1:Lu Xun is known _______ (as/ for

选择括号内恰当的单词填入空白处,使句意完整正确。
小题1:Lu Xun is known _______ (as/ for) a great writer.
小题2:The terrible gas makes people hard to ________ (breath/ breathe).
小题3: ________ (Once/ Unless) people start taking drugs, it will be hard for them to stop.
小题4: The program__________ (offer/ provides) homeless children with house and food.
小题5: Most people in China can get good ________ (medicine/ medical) care.