单选题：_____ for your laziness, you could have finished the assignm..

The old couple have married for 40 years and never once _______ with each other.A．they had quarreledB．they have quarreledC．have they quarreledD．had they quarreled

Only when your identity has been checked ,.A．you are allowed in B．you will be allowed in C．will you allow in D．will you be allowed in

In front of the farmhouse _____. [ ]A. does a small boy sit B. did a small boy sitC. sit a small boyD.sat a small boy

______. It's time for class. [ ]A. The bell goes B. Rings the bell C. There goes the bell D. The bell rings there

Tom wanted to play football with his friends in the street, but his father told him＿＿＿＿＿. A．not toB．not to do C．not do itD．do not to