If you try to do many things______, you’ll become tired out.
A: Are there ____new pens in your pencil--box? B: Yes, there are ____.
A: When do you usually have dinner? B: ____6:30____the evening.
I like English, ____ I am not good at it.
There is ____ office on the first floor(一楼).
A: Is the pen on the desk? B: ____.