_____, he always tries his best to complete it on time.
| A．However the task is hard | B．However hard the task is |
| C．Though hard the task is | D．Though hard is the task |
_____the beginning of the 19th century did scientists know that all matter is made up of atoms.
A,At B,By C,Up to D,Not until
I really do not know _______I had my money stolen.
A,where was it that B,that it was where C,where it was that D,it was where that
All my family had breakfast at half past six,_______my neighbourhood.
A,so has B,nor did C,so had D,nor had
---I would never trust him again . He let me down.
----- _____________.
A,Neither would I B,So would I C,Nor was I D,So did I
____he was not satisfied with his power.
A, King as he was B, King as was he C,A king as he wasD,A king as was he