Helping others is a habit, ________ you can learn even at an early age.
| A．it | B．that | C．what | D．one |
It was not until midnight________they reached the camp site.
A,that B,when C,while D,as
_______you eat the correct foods_____be able to keep fit and stay healthy.
A,Only if,willyou B,Onlyif,you will C,Unless,will you D,Unless,you will
_____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