________ basic first－aid techniques will help you respond quickly to emergencies.

It’s a chicken-and-egg question. I can’t answeryou now.

173. I can hardly imagine Peter _______across the Atlantic Ocean in five days.

Answer the doorbell, please. It must be your uncle. —It Heidi. She’s coming over this morning to help me with my math.

Zhang Lili is very brave and she “The most beautiful teacher”.