Don’t try to do everything at once. Take it a bit __________.
A. at that time B. all the time
C. at times D. at a time
It is five years since my dear aunt __________ here.
A. left B. has left C. is left D. had left
I __________ the Palace Museum with my grandparents the other day.
A. was visiting B. have visited
C. visited D. am visiting
— We can use QQ to talk with each other on the Internet.
— Really? Will you please show me __________ it.
A. what to use B. how to use
C. when to use D. where to use
Many families have their own cars. __________， it causes the terrible air problem.
A. Because B. If C. However D. For
— Hello! Remember me?
— I seem to have met you __________.
A. before B. ago C. since D. some time
