My uncle lives＿＿＿＿116 Changhe Street. His room is ＿＿＿＿the sixth floor.
| A．at； on | B．to； at | C．on； in | D．of； to |
-----If I wasn’t busy., I could have been back by 5:30 o’clock.
----- What a pity! She____ here to see you.
| A．is | B．was | C．had been | D．has been |
They are determined to work out the task,____difficult it is.
| A．however | B．no matter what | C．no matter what | D．whatever |
I have to ____my diet rather than eat the same all the time.，so that I can keep fit.
| A．differ | B．vary | C．contiune | D．range |
If you want to____, you must learn to work hard while you are still young.
A. make your way B. make its way C. make a way Dmake the way
Working hard is not only a_____ of a great success, but is among the essential requirement.
| A．sign | B．signal | C．guarantee | D．marks |