21、I have never seen Jack before.How will I recognize him?
He has large brown eyes and will be wearing a black jacket.
22、The newcomer finished the program in less than half the time allowed.
23、Mr.Yuan is cautious about making predictions about the success of the farming program
because it is so important.
24、An interesting suggestion on how to measure the temperature on the moon has been put
forward.
25、Do you know who left the computer on all night long?It seems that TOM is to blame. He
played computer games yesterday afternoon.