–Sorry! I’m busy today. I can’t go swimming with you. --_______.
| A．No problem | B．You’re welcome | C．That’s all | D．Never mind |
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 |