61.  That would do a lot good to your study and work efficiency.

62.  Computer viruses have done a lot of damage .

63.  We can do Online Education at any time.

64.  We can do a lot of things online, such as searching for information and communicating with friends far away.

65.  Most of us can do a lot of things on-line.

66.  We can do many things online, such as searching for information and communicating with friends far away.

67.  Any man can do these things as easily as to turn one's hand.

68.  We can do a lot of things online, such as searching for information and communicating with friends far away.

69.  Almost none can do a little thing everry day so sometimes something is more faithful than somebody.

70.  Parents can do some but not many things for children to improve their abilities taking care to themselves.