The main cause of HIV / AIDS infection in China is drug abuse, ______ is very serious in Yunnan.
Jane’s way of studying chimps, our group are all going to visit them in the forest.
—Sarah,I’m afraid I couldn’t go to your birthday party. I have a test next Monday.—Oh,______ !You’re my best friend and you must be there!
—The village______ we visited yesterday is very beautiful.—Yes, it’s the place I grew up.
Mr. Smith didn’t understand _____ made his son so upset that evening.
— How can I wake up so early? — Set the alarm at 5 o’clock, you’ll make it.