Are babies carefree(无忧无虑)? A new study from the US says that 2﹣year﹣ old babies care about _________. ( )
A.how others saw them
B.how do others see them
C.how others see them
Rick has learned a lot about Chinese culture _____ he came to China.
--Sorry, I overslept. I forgot to set the alarm. --Your clock ________. Perhaps you should buy a new one.
Be quick, we’ll be late for the meeting.
I still remember my first teacher __________ we haven’t seen each other for many years.
They have been friends __________ they were at primary school.